Propylene glycol

Propylene Glycol
Suzhou Conning Polyols produces industrial grade, food grade, pharmacopoeia grade, electronic grade, chip grade, daily chemical grade, cosmetic grade, and pharmaceutical grade high-purity propylene glycol, widely used in materials, cosmetics, and pharmaceutical industries. Utilizing bio-based technology and biological methods, the product features low chromaticity, biodegradability, compatibility, and thermal stability, and can be used as a raw material for producing solvents, antifreeze agents, etc.

Basic Introduction
Chinese Name: Propylene Glycol
Chemical Name: 1,2-Propanediol
INCI Name: Propylene Glycol
CAS Registry Number: 57-55-6
EINECS Registry Number: 200-338-0
HS Code: 2905320000
Molecular Formula: C3H8O2
Molecular Weight: 76.09
Synonyms: 1,2-Dihydroxypropane; E1520; 2-hydroxypropanol; methyl ethylene glycol; methyl glycol; propane-1,2-diol; propylenglycolum.

Application Fields
Food and Beverage Industry
As a food additive, humectant, and solvent, it enhances the taste and moisture retention of food.
Widely used in food processing, such as making candies, bread, biscuits, and also in the production of condiments and flavorings.
Beverage Industry
Juices and Soft Drinks: Adding sorbitol solution can provide moderate sweetness to juices and soft drinks without introducing additional sugar and calories.
Coffee and Tea Beverages: As a sweetener for coffee or tea, sorbitol solution is suitable for those seeking low-sugar, low-calorie drinks.
Manufacturing Industry: As a coolant and antifreeze agent, it lowers the freezing point of liquids, preventing cooling systems from freezing. Commonly used in automotive, industrial equipment, and air conditioning systems to ensure fluid flow under cold conditions.
Pharmaceutical Manufacturing: As a carrier for drugs and vaccines, it stabilizes and extends the shelf life of medications. In pharmaceutical processes, propylene glycol is used as a solvent and diluent, while also regulating temperature and humidity in medical products.
Daily Chemical Industry: With moisturizing and solvent properties, it makes cosmetics easier to apply and absorb. Added to skincare products, cosmetics, and personal care items such as lotions, creams, lipsticks, etc.
Industrial Manufacturing: As a solvent and intermediate in reactions, it is used in the synthesis of various chemical products. Widely applied in synthetic resins, coatings, paints, solvents, and polymers.

Packaging Methods
Ton barrels, drums, tank trucks

Stability and Storage Conditions
Propylene glycol is hygroscopic and should be stored in sealed containers such as glass, plastic, aluminum, and stainless steel containers, placed in a cool, dry place away from direct sunlight. Propylene glycol is a flammable liquid, so fire safety regulations should be followed during storage and handling. Keep away from open flames, heat sources, and oxidizing agents.

Product Compliance
GB 29216 Standard
Appearance: Colorless, transparent, viscous liquid without sediment or suspended matter
Propylene Glycol Content: ≥99.5
Moisture, %: ≤0.2
Initial Boiling Point (°C): ≥185
Dry Point (°C): ≤189
Residue on Ignition, %: ≤0.007
Specific Gravity (25/25°C): 1.035-1.037
Lead, ppm: ≤1.0
Acid Value: Passes test

CP Standard
Appearance: Colorless, clear, viscous liquid
Moisture, %: ≤0.2
Reducing Substances: Passes test
Residue on Ignition, %: ≤2.5mg
Specific Gravity (25/25°C): 1.035-1.037
Sulfates, ppm: ≤60
Chlorides, ppm: ≤70
Arsenic, ppm: ≤2.0
Heavy Metals: ≤5.0
Acid Value: ≤0.5 0.01mol/L NaOH
Diethylene Glycol Content, ppm: ≤0.001
Dipropylene Glycol, %: ≤0.1
Propylene Oxide, %: ≤0.001

USP Standard
Appearance: Colorless, transparent, liquid
Propylene Glycol Content: ≥99.5
Moisture, %: ≤0.2
Boiling Point (°C): 184-189
Residue on Ignition, %: ≤3.5mg
Specific Gravity (25/25°C): 1.035-1.037
Sulfates, ppm: ≤60
Chlorides, ppm: ≤70
Acid Value: ≤0.2 0.1mol/L NaOH
Diethylene Glycol Content, ppm: ≤0.1
Ethylene Glycol Content, ppm: ≤0.1

EP Standard
Appearance: Colorless, transparent, liquid
Moisture, %: ≤0.2
Boiling Point (°C): 184-189
Reducing Substances: Passes test
Oxidizing Substances: ≤0.2ml 0.05mol/L Sodium Thiosulfate
Residue on Ignition, %: ≤0.01
Specific Gravity (25/25°C): 1.035-1.037
Acid Value: Passes test

BP Standard
Appearance: Colorless, transparent, viscous liquid, hygroscopic
Moisture, %: ≤0.2
Boiling Point (°C): 184-189
Reducing Substances: Passes test
Oxidizing Substances: ≤0.2ml 0.05mol/L Sodium Thiosulfate
Residue on Ignition, %: ≤0.01
Specific Gravity (25/25°C): 1.035-1.037
Acid Value: Passes test
Ethylene Glycol Content, ppm: ≤10

Conning Company Strength Introduction
Conning is a leading national bio-industrial cluster based on synthetic biology and materials science, utilizing bio-manufacturing methods to produce bio-based intermediates, bio-based materials, and bio-based polymers. It comprises several companies including Conning Bioindustry, Conning, Conning Biomaufacturing, Conning Biosynthesis, and Conning Biomaterials.
Conning has established an advanced synthetic biology R&D laboratory and a joint R&D center with Nanjing Tech University, employing over thirty professors, senior engineers, doctors, and masters. The core team comes from prestigious universities such as Peking University, Sichuan University, and Nanjing University.
Conning's business spans bio-based products, biomaterials, biopharmaceuticals, biological products, modern agriculture, biochemistry, and electronic new materials, providing comprehensive product and technical solutions from needs assessment, technology development, product customization, application process development, to intellectual property sharing.
Conning has independently designed and built a GMP-standard flexible automated production line. Leveraging Industry 4.0 intelligent control systems, adopting new jet processing technology, and utilizing high-precision online sensor matrices for real-time monitoring, it achieves multi-category, multi-batch continuous flow production through intelligent algorithm edge computing, creating a smart factory with advanced manufacturing capabilities covering 30,000 square meters.
Conning's production complies with mainstream certification systems such as FSSC22000, ISO9000, ISO14000, RSPO, EU BV, Ecovadis, and US FDA, meeting high standards to cater to the needs of downstream multi-industry clients. Products meet Chinese food standards as well as mainstream standards like Japan JFDA, US USP, and EU REACH, and have passed tests by SGS and CTI.
Conning has been awarded National Top 50 in China Innovation and Entrepreneurship Competition, National Excellent Innovation and Entrepreneurship Project, National High-Tech Enterprise, Jiangsu Province Specialized, Refined, Unique, and New Enterprise, Jiangsu Province Integration of Informatization and Industrialization Standardization Enterprise, First Prize in Jiangsu Province "Maker China" Innovation and Entrepreneurship Competition, and Intelligent Manufacturing Demonstration Workshop.