The difference between trisodium phosphate and tetrasodium phosphate

    As we all know, trisodium phosphate is used as water softener and detergent in chemical industry, textile, printing and dyeing, papermaking, power generation and other industries, boiler anti-scaling agent, water softener in paper dyeing, pH buffer for producing adhesive for waxed and glossy paper, fixing agent in printing and dyeing, mercerizing and reinforcing agent for fabric, and anti-brittle agent for making thread. Metallurgical industry is used for chemical degreasing and decontamination, and is used as an excellent accelerator in photographic developing solution. Tooth cleaner and bottle cleaner. Coagulant for rubber latex. Sugar juice purifying agent。

However, many people do not know what tetrasodium phosphate is. In fact, tetrasodium phosphate is sodium pyrophosphate. Products with different names are the same. Tetrasodium phosphate is used in electroplating industry to prepare electroplating solution and can form complex with iron. Wool spinning industry is used as wool degreaser and bleaching agent. The paper industry is used for bleaching paper and plant fibers. The printing and dyeing industry is used as an auxiliary agent in printing and dyeing and fine bleaching. The daily chemical industry is used as a toothpaste additive, can form colloid with calcium hydrogen phosphate and play a stabilizing role, and can also be used for synthesizing detergents and producing shampoo paste and other products. Used as water softener in water treatment. Used as rust remover in mechanical processing. Used as dispersant and emulsifier in chemical production. It can also be used as water treatment agent, oil drilling, etc. and as quality improver, emulsifier, buffer, chelating agent, etc. in food industry.
Sodium pyrophosphate not only has the function of softening water, but also can redissolve insoluble salts of calcium and magnesium. For example, dirt formed by insoluble calcium soap or other metal soap is mixed in clothing fibers, which can redissolve and improve the decontamination capability. In addition, sodium pyrophosphate has the function of deflocculation, which makes the grease emulsify. This is called peptization. It can also further reduce the surface tension and interfacial tension of the surfactant solution and play the role of washing aid.