Tetrakis(hydroxymethyl)phosphonium sulfate

　　Main Application Scenarios (by Function)

　　The core advantages of THPS are **"high-efficiency sterilization + biodegradability + low toxicity"**, making it particularly suitable for scenarios with strict environmental requirements:

　　Industrial Water Treatment Sector

　　Circulating Water Sterilization and Algae Removal: In circulating cooling water in the petroleum, chemical, and power industries, dosing at 50-200ppm can inhibit sulfate-reducing bacteria (the main bacterial group causing pipeline corrosion) and algae proliferation. The effect is superior to traditional chlorine-based disinfectants (no residual chlorine pollution), and it causes no corrosion to carbon steel and copper alloy equipment;

　　Corrosion Protection in Oilfield Water Injection Systems: Used for microbial control in water injection pipelines during oil and gas extraction to prevent bacterial growth and biofilm formation that blocks pipelines. Meanwhile, its chelating property can reduce rust deposition and extend pipeline service life.

　　Agriculture and Aquaculture

　　Aquaculture Water Disinfection: At a concentration of 0.1-0.5ppm, it can kill vibrio, fungi, and planktonic algae in fish ponds, improving water quality (reducing ammonia nitrogen content). It has low toxicity to fish and shrimp (the median lethal concentration LC50 is far higher than the commonly used concentration), making it superior to prohibited fishery drugs like malachite green;

　　Crop Preservation: Used as a seed treatment agent (soaking seeds in a 1%-2% solution), it can inhibit fungal-induced seed mildew and increase germination rates (e.g., rice and wheat seed germination rates increased by 8%-12%). The degradation product is phosphoric acid (which can be used as fertilizer), achieving the dual effect of "disinfection + fertilization".

　　Materials and Textile Industry

　　Wood Preservation Treatment: Reacts with cellulose in wood to form stable phosphate esters, preventing mold and termite infestation. It is suitable for outdoor wooden flooring and sleeper treatment (extending wood service life by 3-5 years after treatment), replacing traditional arsenic-containing preservatives (more environmentally friendly);

　　Fabric Flame Retardant Finishing: Used for flame retardant treatment of cotton and linen fabrics. Through cross-linking of hydroxymethyl groups with fiber hydroxyl groups, a flame retardant coating is formed, raising the fabric's Limiting Oxygen Index (LOI) from 20 to over 28 (meeting flame retardant standards), without affecting fabric breathability.