Negotiable

Category: Instruments & Meters/Electrical Instruments/Energy Meters

Company: Haiyan Weijia Electrical Technology Co., Ltd

Product Description: SHUNT is precision element for the energy meter, adopts the advance technical of plane jointing.   Electricity Meter Shunt Useage: Work in all kinds of electrical meter as power measurer Strength: 1. Good material, sampling resistance precision and stable. 2. Various type. 3. Good service: Make according to customer requirement. more>

$1500

Category: Chemicals/Plastics & Products/Recycled Plastics

Company: Suzhou bojie resin technology co.,ltd

Product Description: Non-ferrous elting, electronic materials and other industries often contain a large number of divalu copper ions. Because of the large discharge of copper-containing wastewater and the high economic value of metal copper, it is beneficial to both environmental management and resource recycling if copper-containing wastewater can be discharged to the standard discharge (0.5mg/l) at the same time. Suzhou Bojie Resin Technology Co., Ltd. provides ion exchange resin recycling wastewater copper, ion exchange with separation selectivity. The water purification effect is good. The advantages of high concentration multiple and environmental friendliness have attracted much attention in copper-containing wastewater treatment and copper resource recovery. more>

$3.00

Category: Others

Company: Quanzhou great jue import and export trade co., LTD

Product Description: Hole hole shoes. Of all kinds. Gm. At least 6000 pieces more>

$100

Category: Machinery & Equipment/Compression & Separation Equipment/Screw Air Compressors

Company: Xiamen Qihe automobile parts co., ltd

Product Description: "1: Scope of application: pure electric buses, logistics vehicles, etc. 2. Function and left and right: professional supporting equipment to provide compressed air power source. Compact structure, convenient installation for customers, high efficiency, low noise, safety and energy saving. "Customize products, calculate prices according to customer's design drawings, sales volume, etc. more>

$10

Category: Interwoven Fabric

Company: Putian Jishengxin Shoes and Clothing Co., Ltd

Product Description: It is a kind of artificial Elastic fiber, the best elastic fabric, which can be extended to 4-6 times of the original length, with excellent stretch. It is suitable for blending with various fibers, and can strengthen the advantages of droop and wrinkle resistance. DuPont Lycra, which contains chlorine resistant ingredients, will provide swimwear with a longer lifespan than regular swimwear materials more>

$0.00

Category: Electrical Equipment & Supplies/Power Distribution & Transmission/Cables

Company: Guangdong OMG Transmission Technology Co., Ltd.

Product Description: Driven by the global "dual carbon" goal, energy storage systems have become the core support for building new power systems. As the "blood vessels" of energy storage devices, the quality and performance of energy storage cables directly discuss the charging and discharging efficiency, stability and safety of the system. With the rapid growth of renewable energy installed capacity and the continuous expansion of industrial, commercial and household energy storage scenarios, the construction of energy storage power stations and distributed energy storage facilities is in full swing, which has explosively increased the demand for professional cables with high flame retardancy, high temperature resistance and low loss characteristics. Every qualified energy storage cable carries the heavy responsibility of efficient conversion and safe transmission of electric energy. Its technological innovation and capacity improvement are becoming a key link in ensuring the high-quality development of the energy storage industry.   DC charging cable: the choice of public fast charging piles   DC charging cables bear the heavy responsibility of connecting DC charging piles and electric vehicles, and are the core components in the field of public fast charging. In addition to the positive and negative high-voltage DC wires and ground wires, the cable is also equipped with communication wires and control wires. This complex structure can not only achieve the rapid transmission of high-power electrical energy, but also accurately match the charging needs of electric vehicles through communication and control systems, and can use the charging time to facilitate electric vehicle users.   Recognize professional DC charging cable manufacturers, just at OMG Cable Factory. more>

$800

Category: Others

Company: Guangdong Huajian Inspection Co., Ltd

Product Description: Professional Third-Party Toy and Children's Product InspectionFor toy product inspections, we generally adopt the AQL standard (Acceptable Quality Limits) to define the degree of product defects and the acceptable range.Key inspection points for infant products on-site:1. Bite test2. Drop test3. Product dimensions and weight measurement4. Color difference check5. Function check6. Stability test7. Wood composition and humidity test8. Impact and dynamic test9. Printing and coating adhesion test10. Pull test11. Water resistance test12. Barcode scanning test13. Odor check14. Physical and mechanical parts test15. Flame retardant test16. Toy safety test17. Age labeling18. Warning labels19. Traceability labelsScope of children's product inspection services:1. Apparel: Baby onesies, baby swimwear, toddler shoes, functional shoes, children's sports shoes, baby socks, baby hats, etc.;2. Feeding: Bottles, bottle brushes, bottle sterilizers & warmers, food grinders, children's tableware, children's insulated cups, infant high chairs, teethers, pacifiers, etc.;3. Bath and care: Baby bathtubs, baby basins, infant bath towels, towels, drool bibs, bibs, etc.;4. Daily care: Cribs, crib bumpers, playpens, child seats, ear thermometers, baby nail safety scissors, baby nasal aspirators, baby medicine dispensers, etc.;5. Travel: Strollers, infant car seats, scooters, etc.Detailed content:1. On-site verification of BOOKINGUpon arrival at the factory, clarify the day's inspection tasks with the factory manager and promptly report any issues to the company to check for the following problems:1) Actual production quantity does not meet inspection requirements2) Actual production quantity has been altered relative to the order3) Actual inspection location does not match the application2. Carton samplingNumber of cartons to sample: Generally, FRI follows the square root of the total number of cartons, while RE-FRI is the square root of the total number of cartons multiplied by 2.3. Verification of outer and inner carton markingsMarkings on outer and inner cartons are crucial for product shipment and distribution. Labels such as fragile stickers also serve as reminders for protection during the product's journey to the consumer. Any discrepancies in markings must be noted in the report.4. Verification of the ratio of outer to inner cartons and whether product packaging meets customer requirements, with detailed descriptions in the packaging section of the report.5. Verification of consistency among the product, sample, and customer documentation. Any differences should be taken seriously.Note:1) The actual function of the toy and whether accessories match the packaging color images, instructions, etc.2) Markings such as WEEE and age classification3) Barcode readability and accuracy6. Appearance and on-site testingA) Toy appearance inspectiona. Retail packaging of toys:(1) Must be free of dirt, damage, and moisture(2) Must not lack barcode, manual, importer address, country of origin(3) Check for errors in packaging methods(4) If the circumference of the packaging bag opening is ≥380mm, it must have holes and a warning label(5) Check if color box adhesion is secure(6) Check if blister packaging is secure, free of damage, wrinkles, or indentationsb. Toys:(1) Must not have sharp edges or points(2) Must not produce small parts for children under three years old(3) Check if instructions are missing or printed unclearly(4) Check if corresponding warning labels are missing on the product(5) Check if general decorative stickers are missing on the product(6) Must be free of insects or mold stains(7) Must not emit odors(8) Check for missing or incorrect parts(9) Check for deformed, dirty, damaged, scratched, or bruised plastic parts(10) Check for poor spray painting, missed spraying, or incorrect spraying of parts(11) Check for poor color injection molding, bubbles, color spots, or flow marks(12) Check for burrs on parts or uncleaned injection points(13) Check for functional defects(14) When the valve plug is fully inflated, it must fit into the valve seat, and the protrusion height must be less than 5mm(15) Must have a reflux valveB) General on-site testing of toysa. Full assembly test must match the instructions and packaging color box descriptionb. Full function test for 4 hours must match the instructions and packaging color box descriptionc. Product dimensions checkd. Product weight check: Facilitates verification of material consistencye. 3M tape test for product printing/marking/silk screenf. ISTA drop test: One point, three edges, six sidesg. Product pull testGuangzhou Huajian Commodity Inspection Co., Ltd. has prepared inspection processes for various products for our extensive clientele. We are meticulous, cautious, and offer competitive prices, with long-term cooperation being especially favorable. Inquiries are welcome! For more information, please follow Guangzhou Huajian Commodity Inspection! www.hqc-inspection.com more>

$800

Category: Others

Company: Guangdong Huajian Inspection Co., Ltd

Product Description: Huajian Company's Inspection Standards for Daily-Use Ceramic Plates, Bowls, and Cup SaucersPlates1. Visible surface: No more than 2 glaze drips, no more than 2 glaze deficiencies, no more than 2 debris spots, no more than 2 black spots (each black spot must not exceed 1mm). No more than 3 of any single type of defect may be present simultaneously.2. Non-visible surface: No more than 3 glaze drips, no more than 3 glaze deficiencies, no more than 3 debris spots, no more than 3 black spots (each black spot must not exceed 1mm). No more than 4 of any single type of defect may be present simultaneously.3. Place the plate flat on a level surface to check for warping. Standard is:For plates 9” and under: Slide a single 1-yuan coin along the rim. If it passes easily through the gap between the plate and the level surface, the item is defective.For plates over 9”: Slide two stacked 1-yuan coins along the rim. If they pass easily through the gap between the plate and the level surface, the item is defective.Note: The above must be performed on a flat surface, and the coin must be a standard 1-yuan coin!4. On the bottom of the plate, pay attention to the polishing. When placing a hand on it, there should be no obvious rough or scratching sensation. A qualified product should have a smooth surface.5. The polished bottom should be even without any indentation marks. Presence of such marks renders the item defective.6. While inspecting the bottom, ensure there is no blackening of the base. Slight blackening is acceptable, but if it exceeds 1/4 of the total area, the item is defective.7. The bottom mark should be located at the very center of the base. Any significant deviation or large blooming (blooming diameter must not exceed 2.5mm, including 2.5mm) renders the item defective.8. Packaging must not be loose. It should meet export packaging requirements for ease of transportation and handling.9. Products should have a relatively clean appearance. Excessively dirty products should be reported to the factory for improvement promptly, otherwise they will be returned.10. Ensure all plate shapes exactly match customer requirements without any discrepancies.11. For plates 9” and under, dimensions must not exceed the original specified size by more than 3%; for plates over 9”, dimensions must not exceed by more than 2.5%.12. For plates 9” and under, dimensions must not exceed the original specified size by more than 3%; for plates over 9”, dimensions must not exceed by more than 2.5%.Bowls1. Visible surface: No more than 2 glaze drips, no more than 2 glaze deficiencies, no more than 2 debris spots, no more than 2 black spots (each black spot must not exceed 1mm). No more than 3 of any single type of defect may be present simultaneously.2. Non-visible surface: No more than 3 glaze drips, no more than 3 glaze deficiencies, no more than 3 debris spots, no more than 3 black spots (each black spot must not exceed 1mm). No more than 4 of any single type of defect may be present simultaneously.3. Check for warping. Standard is:For bowls 9” and under: Slide a single 1-yuan coin along the rim. If it passes easily through the gap between the bowl and the level surface, the item is defective.For bowls over 9”: Slide two stacked 1-yuan coins along the rim. If they pass easily through the gap between the bowl and the level surface, the item is defective.Note: The above must be performed on a flat surface, and the coin must be a standard 1-yuan coin!4. On the bottom of the bowl, pay attention to the polishing. When placing a hand on it, there should be no obvious rough or scratching sensation. A qualified product should have a smooth surface.5. The bowl rim must be perfectly round, square, or as required by the customer. If the rim is not round, not square, or deviates from the customer's specified shape, the item is defective.6. The polished bottom should be even without any indentation marks. Presence of such marks renders the item defective.7. While inspecting the bottom, ensure there is no blackening of the base. Slight blackening is acceptable, but if it exceeds 1/4 of the total area, the item is defective.8. The bottom mark should be located at the very center of the base. Any significant deviation or large blooming renders the item defective.9. Packaging must not be loose. It should meet export packaging requirements for ease of transportation and handling.10. Products should have a relatively clean appearance. Excessively dirty products should be reported to the factory for improvement promptly, otherwise they will be returned.11. Ensure all bowls exactly match customer requirements.12. For bowls 9” and under, dimensions must not exceed the original specified size by more than 3%;13. For bowls over 9”, dimensions must not exceed by more than 2.5%.Cup and Saucer Sets1. Saucer visible surface: No more than 2 glaze drips, no more than 2 glaze deficiencies, no more than 2 debris spots, no more than 2 black spots (each black spot must not exceed 1mm). No more than 3 of any single type of defect may be present simultaneously.2. Saucer non-visible surface: No more than 3 glaze drips, no more than 3 glaze deficiencies, no more than 3 debris spots, no more than 3 black spots (each black spot must not exceed 1mm). No more than 4 of any single type of defect may be present simultaneously.3. For saucers: Slide a single 1-yuan coin along the rim. If it passes easily through the gap between the saucer and the level surface, the item is defective.4. The saucer well must not be too large or too shallow. If the cup easily slips or wobbles slightly, the saucer is defective.5. The ceramic color of the cup and saucer must match without any color difference; this is especially critical for colored glaze products.6. The cup rim must be perfectly round, square, or as required by the customer. If the rim is not round, not square, or deviates from the customer's specified shape, the item is defective.7. The connection between the handle and the cup body must have no cracks (commonly known as cracked handle). The handle must be properly positioned and not crooked.8. Place the saucer flat on a level surface to check for warping. Standard is: Slide a single 1-yuan coin along the rim. If it passes easily through the gap between the saucer and the level surface, the item is defective.9. On the bottom of the cup or saucer, pay attention to the polishing. When placing a hand on it, there should be no obvious rough or scratching sensation. A qualified product should have a smooth surface.10. The polished bottom should be even without any significant indentation marks. Presence of such marks renders the item defective.11. While inspecting the bottom, ensure there is no blackening of the base. Slight blackening is acceptable, but if it exceeds 1/4 of the total area, the item is defective.12. The bottom mark on the cup or saucer should be located at the very center of the base. Any significant deviation or large blooming renders the item defective.13. Packaging must not be loose. It should meet export packaging requirements for ease of transportation and handling.14. Products should have a relatively clean appearance. Excessively dirty products should be reported to the factory for improvement promptly, otherwise they will be returned.15. Ensure all cups and saucers exactly match customer requirements.16. Dimensions for cups and saucers must not exceed the original specified size by more than 3%. more>

Negotiable

Category: Chemicals/Organosilicon/Silanes

Company: 南京丹沛化工有限公司

Product Description: Applications • XIAMETER® MEM-0349 emulsion can be used as a polishing agent component in automotive and furniture polishes, providing excellent gloss with minimal application. • Release agent for the following products: o Rubber or plastic parts (bottle stoppers, screw caps, barrel plugs, etc.). • Lubrication for the following products: o Extruded rubber parts; conveyor belts. • Textile machinery lubricants: o Spinning o Sewing thread lubrication o Knitwear manufacturing o Sewing needle lubrication o Glass cloth exhaust filtration devices. more>

$25000

Category: Chemicals/Ethers/Other Ethers

Company: 济南鑫博化工有限公司

Product Description: 2-Methyltetrahydrofuran more>

Negotiable

Category: Others

Company: 江苏卓亚环保有限公司

Product Description: Product Introduction      The elastic three-dimensional filler selects several high-quality varieties of polyolefin and polyamide that are corrosion-resistant, temperature-resistant, and aging-resistant. Mixed with additives such as hydrophilicity, adsorption, and heat-oxygen resistance, it uses a special wire drawing and filament fluffing process to interweave and fix the filaments onto a corrosion-resistant, high-strength central rope. Due to the excellent material selection and process formulation, the filaments are arranged in a three-dimensional, uniform radial pattern, forming a suspended three-dimensional elastic filler unit. Within the effective area, the filler can fully expand in all directions, allowing gas, water, and biofilm to mix, penetrate, and exchange thoroughly. The biofilm can not only uniformly attach to each filament, maintaining good activity and variable porosity, but also achieve an increasingly large specific surface area during operation while facilitating effective metabolism. This characteristic and phenomenon are currently unmatched by other domestic fillers.  Product Features      Compared to rigid honeycomb fillers, the three-dimensional elastic filler offers greater porosity variability and is not prone to clogging. Compared to soft fillers, it has a longer material lifespan and does not adhere or clump. Compared to semi-soft fillers, it provides a larger specific surface area, faster biofilm attachment, and lower cost. Therefore, this filler can be confirmed as the fourth-generation high-efficiency, energy-saving, and innovative filler following various rigid, soft, and semi-soft fillers. Scope of Application  Widely used as a biological filler in biological contact oxidation tanks and hydrolysis acidification tanks. more>

$电议

Category: Chemicals/Water Treatment Agents/Corrosion Inhibitors

Company: 深圳华净源科技有限公司

Product Description: SJ109-Algicide and Bactericide【Product Performance】A highly efficient, powerful broad-spectrum bactericide that rapidly eliminates bacteria, fungi, algae, and slime molds within the system, ensuring clean and unobstructed heat exchangers. Suitable for various air conditioning and industrial circulating cooling water systems.【Usage Method】Directly inject into the system water or sprinkle on moss surfaces.【Packaging and Storage】Packaged in plastic drums, 25kg/drum; store in a ventilated, cool, and light-protected environment with a shelf life of one year.【Precautions】Store in a ventilated, cool, and dry place. Operators must wear rubber gloves and protective goggles. If accidentally splashed on skin or into eyes, immediately rinse with plenty of water for more than 15 minutes.Shenzhen Huajingyuan Technology Co., Ltd.Our company is a comprehensive service enterprise for central air conditioning systems. With professional HVAC and water treatment technical engineers, an experienced service team, self-developed water treatment equipment, and long-term service partners, we excel in central air conditioning operation management, maintenance, energy-saving renovations, and water treatment.As national environmental regulations and standards continue to rise, the company adheres to the corporate philosophy of "people-oriented, integrity-based, pragmatic, and innovative," committed to the sustainable development of environmental protection and energy conservation. We provide full-process solutions for central air conditioning, industrial dust removal, clean rooms, and waste gas and water treatment, serving every customer with excellence.The company's business scope has expanded to cover the Greater Bay Area. With continuous growth, service points have been established in Changsha, Xi'an, Jingmen, and other locations. A production base has been set up in Huizhou with purchased factory premises. more>

Negotiable

Category: Chemicals/Laboratory Reagents/Other Chemical Reagents

Company: Hubei new DE sheng material science and technology co., LTD.

Product Description: The characteristics of CHAPS CHAPS (CAS75621-03-3), CAS number: 75621-03-3 | Molecular formula: C 32 H 58 N 2O 7 S, full chemical name 3- [(3-Cholamidopropyl) dimethylo] -1-propanesulfonate, is a zwitterionic surfactant widely used in protein preparation, dissolution, and separation. It is a white powder solid at room temperature, with good water solubility (50 mg/mL), but has hydrophobicity at the molecular level. When CHAPS is dissolved in water, its aqueous solution appears colorless to light yellow transparent. The application of CHAPS CHAPS is a non denaturing detergent used to dissolve membrane proteins and disrupt protein-protein interactions. The structure of this surfactant combines the useful properties of sulfobetaine type and bile salt detergent 2. Some studies have shown that compared to NP-40 and Triton X-100, CHAPS can mildly and effectively destroy the nuclear membrane, dissolve membrane proteins, and disrupt protein-protein interactions (PPI). CHAPS can protect the natural state or conformation of proteins, thereby maintaining their activity and function. Therefore, CHAPS is widely used in biological science research fields such as cell lysis and protein purification. For proteomics: In the preparation of TMT samples for mammalian cell and tissue analysis, the use of CHAPS lysis buffer can avoid accidental protein degradation during protein digestion and improve protein extraction efficiency. CHAPS has been successfully used to dissolve endometrial proteins and receptors, and has the ability to maintain protein activity. Proteins can also be iodized in the presence of CHAPS. Precautions for using CHAPS When preparing any solution using CHAPS, please try not to shake or stir vigorously. Its storage conditions are 2-8 ℃ refrigeration 2. Before adding CHAPS (0.5% w/v), the remaining DNA contamination was degraded by incubating with Benzonase nuclease at 37 ° C. Remove crude lysate from cell fragments by centrifugation (3000 g, 10 minutes). With the increasing awareness of chemical safety in the global market, more and more users are searching for CHAPS without DMF (dimethylformamide) for their applications. As a leading CHAPS manufacturer, Desheng has been investing in its research and development resources to develop solutions to remove DMF from its CHAPS manufacturing process. So far, the results have been satisfactory. If you are looking for a CHAPS supplier, please contact Desheng professional customer service! more>

Negotiable

Category: Chemicals/Chemical Intermediates/Intermediate Compounds

Company: Hubei new DE sheng material science and technology co., LTD.

Product Description: Tris buffer is a commonly used biochemical and molecular biology laboratory reagent, composed of Tris (trimethylaminomethane) and acidic substances (such as hydrochloric acid), which can effectively maintain the pH value of the solution within the acid-base range. The stability and storage time of the buffer solution are crucial factors that must be considered in the experiment. So let's talk in detail about the storage time of Tris and provide relevant suggestions to ensure the quality and effectiveness of the buffer solution. 1、 Storage time of buffer solution Tris buffer can maintain relatively stable properties at room temperature, and it is generally recommended to store at 4 ° C. In addition, the storage time may vary depending on different preparation methods and formulas. Generally speaking, Tris buffer solution that has been properly prepared and sterilized can be stored for several months to one year under refrigeration conditions. However, it should be noted that its storage time may also be affected by other factors, such as the pH value of the solution, temperature, light exposure, and contamination. 1、 Storage time of buffer solution Tris buffer can maintain relatively stable properties at room temperature, and it is generally recommended to store at 4 ° C. In addition, the storage time may vary depending on different preparation methods and formulas. Generally speaking, Tris buffer solution that has been properly prepared and sterilized can be stored for several months to one year under refrigeration conditions. However, it should be noted that its storage time may also be affected by other factors, such as the pH value of the solution, temperature, light exposure, and contamination. 2、 Determine whether the buffer solution has failed Before use, the appearance and color of the buffer should be checked. If there is turbidity, sedimentation, or color change, it indicates that the buffer may have deteriorated. Additionally, pH test strips or pH meters can be used to measure the pH value of the buffer solution, ensuring that it remains within the desired range. At the same time, some control experiments should be conducted before use, such as electrophoresis experiments or PCR reactions, to ensure that the buffer can still provide the required function and effect. 3、 Optimization and preservation of buffer solution In order to extend the storage time of Tris, sterile technology can be used to prepare buffer solution, avoid contamination during the preparation process, and divide the solution into small containers to avoid frequent opening of the main storage container, in order to reduce contact with air and pollutants. Close the container promptly after use to prevent the entry of oxygen and moisture, and avoid prolonged exposure to room temperature or high temperature environments. Tris buffer is a commonly used pH regulating reagent in the laboratory, which can maintain relatively stable properties and functions under correct storage conditions. If there are any changes during use, a new buffer should be prepared to ensure the accuracy and reliability of the experiment. In addition, it is necessary to regularly check and update the inventory of buffer solution to avoid using expired buffer solution. As a high-quality manufacturer of buffering agents, Desheng's products are in the original powder state, which can help customers effectively store, facilitate transfer and transportation. At the same time, the preparation is simple, ready to use, effectively saving time and cost. If you are interested, please feel free to contact us for purchase at any time! more>

Negotiable

Category: Others

Company: Hubei new DE sheng material science and technology co., LTD.

Product Description: Since the outbreak of the new coronavirus, the virus preservation solution has played a major role. First, nasal and throat swabs are used for sample sampling, and the samples are placed in a sampling tube with virus preservation solution for sample protection, which improves the accuracy of nucleic acid detection. The virus preservation solution is a solution medium used for virus sampling, transportation, preservation, and detection. It is added to the virus sampling tube. What kind of virus preservation solution is added? There are two types of virus preservation solutions, inactivated and non-inactivated. There are many types of virus preservation solutions on the market. The following Desheng editor briefly introduces several principles for the selection of virus preservation solutions. Non-inactivated preservation solution: The non-inactivated type does not contain lysis solution. On the basis of Hank's, it is added with BSA (bovine serum albumin) amino acids, vitamins and other nutrients required by the virus, which can maintain the activity of the virus in a wide temperature range and maximize the retention The originality of the sample can be used for virus nucleic acid extraction and detection, virus cultivation and isolation. Features of non-inactivated preservation solution: 1. The virus can remain active and can be used for detection or virus isolation; 2. It has no inhibition on subsequent nucleic acid amplification and can be matched with direct amplification reagents; 3. After adding the swab, it should be stored in the refrigerator, and the main ingredients should be tested as soon as possible. Inactivation preservation solution: The inactivation preservation solution fully mixes the collected sample with the virus lysis solution and the virus nucleic acid preservation solution to achieve the inactivation of the virus in the sample, while effectively ensuring the integrity of the virus nucleic acid in the sample. The collected sample can be kept at room temperature. Transportation and long-term storage under conditions. The stored viral RNA samples can be widely used in genetic testing, enzyme-linked immunoassay (ELISA), PCR testing, etc. The inactivated preservation solution can be divided into guanidine-containing and non-guanidine-containing solutions. I believe that after reading the above explanation, there is a more basis for choosing the correct and suitable preservation solution. Desheng is a manufacturer of virus preservation solution. It can provide two types of preservation solutions, inactivated and non-inactivated, and can accept customized samples provided by customers. It can also provide disposable virus sampling tubes and nasopharyngeal swabs, etc., to provide customers with one-stop service. If you need it, you can click on the official website for consultation or directly contact our professional sales staff. more>

Negotiable

Category: Chemicals/Heterocyclic Compounds/Aminopyridine

Company: Hubei new DE sheng material science and technology co., LTD.

Product Description: 1. Basic nature The application of acridine compounds in chemiluminescence detection has the following advantages: Low background luminescence and high signal-to-noise ratio; Less interference factors in luminescence reaction; The light release is fast and concentrated, the luminous efficiency is high, and the luminous intensity is large; It is easy to link with protein and the photon yield does not decrease after linking; The markers are stable (storable for several months at 2-8C), they have good solubility in water, are stable and are not easily hydrolyzed. The chemiluminescence of acridine compounds does not require a catalyst and can emit light in a dilute alkaline solution containing H2O2. The luminescence of the compound is flash type. After adding the luminescence starter, the emitted light intensity reaches the maximum in about 0.5s, and the half-life is about 1s. Acridine compounds are used in chemiluminescence immunoassay (CLIA). That is, the antibody or antigen is labeled with acridine salt, and HNO3+H2O2 and NaOH are used as the luminescence priming reagent. Some add Triton X-100, CTAC, Tween-20 and other surfactants to the luminescence priming reagent to enhance luminescence. Acridine compounds are commonly used in environmental analysis, immunoassay, enzyme activity analysis and labeling oligonucleotide fragments, etc., and are used clinically to determine bacteria, viruses or other disease markers. 2. Acridine ester DMAE-NHS or NSP-DMAE-NHS Acridine ester DMAE-NHS or NSP-DMAE-NHS is an ideal chemiluminescence immunoassay labeling substance with good luminescence performance. Compared with the widely used acridinium ester AE-NHS, the luminescence intensity of the acridinium ester DMAE-NHS or NSP-DMAE-NHS and antibody (Ab) conjugates is higher, and the luminescence dynamics of the two are very similar. Both are flash-type luminescence and both reach the highest at 0.4s, but the thermal stability of DMAE-NHS or NSP-DMAE-NHS is significantly higher than that of AE-NHS. AE-NHS is only stable in acidic solutions, when pH>6.3 It is easy to hydrolyze later, but DMAE-NHS or NSP-DMAE-NHS is not. For example, at room temperature, it is very stable in a PB buffer with a pH of 7.0. After 16 days, the luminescence activity is only reduced by 3.6%. Their luminescence thermal stability with protein conjugates is similar to this. The acridinium ester DMAE-NHS or NSP-DMAE-NHS is easy to label biomolecules and the luminescent activity and biological activity of the labeled compound are stable. The synthesized luminescent label is applied to chemiluminescence immunoassay with high sensitivity and other ideals. For example, the minimum detection limit of TSH is 0.007 mIu/L. Therefore, the acridinium ester DMAE-NHS or NSP-DMAE-NHS has good application value for the research of chemiluminescence analysis and chemiluminescence immunoassay. 3. Acridine Sulfonamide NSP-SA-NHS Acridine sulfonamide is a very effective more>

Negotiable

Category: Chemicals/Catalysts & Additives/Accelerators

Company: Yueyang Zhongzhan Technology Co., Ltd.

Product Description: 　　ZH2950 is an accelerator specifically designed for amine-based epoxy curing agents. In solvent-free epoxy coating systems, its accelerating effect is equivalent to that of products such as K54 (DMP-30). When used alone as a curing agent for 128 epoxy resin, it can achieve surface drying in 2.5 hours and complete curing in 24 hours at 5°C. When used as an accelerator in solvent-based epoxy coatings, its pot life is approximately twice that of K54. Its accelerating effect is even more significant when applied in polyurethane systems. It is miscible with water.【技术指标】Specification外观Appearance浅黄色透明液体Light yellow transparent liquid氨值Amine valuemgKOH/g650~700粘度ViscosityCp 25℃2000~6000活泼氢当量AHEWg/eq计算75推荐用量Recommended dosagePHR eew=190 40 　　【应用】Application低温、水性体系的胺类酰胺类固化剂的促进剂，聚氨酯体系。Suitable for accelerating amine or amide curing agents in low-temperature environments, waterborne epoxy systems, and polyurethane formulations.【包装及储存】Packaging & Storage Instructions聚丙烯塑料桶或内涂铁桶，25kg/200kg。常温室内贮存，保质期12个月。Packaging: Polypropylene plastic drums or internally coated iron drums, 25kg/200kg per drum.Storage: Store at room temperature in a dry indoor area. Shelf life: 12 months. more>

Negotiable

Category: Chemicals/Alcohols/Other Alcohols

Company: Wuxi High-Mountain Hi-tech Development Co., Ltd.

Product Description: more>

Negotiable

Category: Chemicals/Chemical Intermediates/Intermediate Compounds

Company: 山东丰源化工有限公司

Product Description: CAS NO:4418-61-5EC NO:224-581-7Molecular Formula:CH3N5Molecular Weight:85.07Synonyms:;tetrazol-5-ylamine;5-Aminotetrazole;5-Amino tetrazole;5-Amino-1H-1,2,3,4-Tetrazole;5H-tetrazol-5-imine;1H-Tetrazol-5-amin;1H-Tetrazol-5-amine;2H-tetrazol-5-amine;5-Amino-1H-Tetrazole;Molecular Structure:CAS NO:4602-84-0EC NO:225-004-1Molecular Formula:C15H26OMolecular Weight:222.3663Synonyms:;farnesol, mixture of stereo isomers;Farnesol;3,7,11-Trimethyl-2,6,10-dodecatrien-1-ol;(2E,6E)-3,7,11-trimethyldodeca-2,6,10-trien-1-ol;(2E,6Z)-3,7,11-trimethyldodeca-2,6,10-trien-1-ol;Molecular Structure: more>

Negotiable

Category: Chemicals/Chemical Intermediates/Intermediate Compounds

Company: 绍兴市浙东化工厂

Product Description: CAS NO:36290-04-7EC NO:Molecular Formula:C21H14Na2O6S2Molecular Weight:472.4418Synonyms:;Dispersing Agent NNO;sodium naphthalene-2-sulfonate formaldehyde (1:1:1);disodium 5-[(7-sulfonatonaphthalen-1-yl)methyl]naphthalene-2-sulfonate;Sodium methylenedinaphthalene disulphonate;Diffusing agent NNO;Sodium polynaphthalene sulfonate;SNF Sodium Naphthalene Sulfonate Formaldehyde Concrete Agent;Molecular Structure: more>