Propyl paraben chemical name: propyl paraben, propyl paraben Product Name: Propylparaben Propyl 4-hydroxybenzoate formula: C10H12O3 Molecular Weight: 180.20 Appearance: colorless or white crystalline powder Content: 99% Melting point : 95-98 * Salt (to SO42- dollars)%: 0.024 Heavy metals (as Pb)%: 0.001 arsenic (AS)%: 0.0001% Residue on ignition: 0.05% Loss on drying: 0.5 Physical properties: white crystal, soluble in alcohol and ether, almost insoluble in water, relative density (d4102) 1.0630, refractive index (nD102) 1.5050. Uses: This product is mainly used for food, cosmetics, medicine antiseptic, also used for feed preservatives. Others Description: paraben is internationally recognized as the broad spectrum of efficient food preservative, the United States, Europe, Japan, Canada, South Korea, Russia and other countries allow parabens used in foods. Are widely used in soy sauce, vinegar, spices, pickles, baked goods, butter products, beverages, wine and fresh fruits and vegetables and so on. Parabens contain paraben, methyl paraben, ethyl paraben, propyl paraben, butyl paraben and octyl sodium methyl paraben, ethyl paraben, sodium, sodium propyl paraben, butyl paraben and sodium compound paraben sodium carbonate, depending on the used in food, medicine, organic synthesis and other industries corrosion physicochemical properties. Parabens, also known as parabens, because it has a phenolic hydroxyl group structure, anti-bacterial properties than benzoic acid, sorbic acid are strong. Its mechanism of action is: the destruction of the cell membrane of microorganisms, denature proteins within cells, and inhibit microbial cell respiratory enzymes and electron transport enzyme activity. Antibacterial activity of parabens is mainly molecular work, and the hydroxyl molecule has its esterification, no longer ionized, so that it is within the range of pH3 ~ 8's have a good antibacterial effect. The preservative benzoic acid and sorbic acid are acidic, they are very poor inhibitory effect in pH> 5.5 products. Safety paraben is high, with ethyl example, the LD50 of 5000mg / kg, ADI is 0 ~ 10mg / kg, while the acid LD50 of 2530mg / kg, ADI is 0 ~ 5mg / kg, Yamanashi Acid LD50 of 7630mg / kg, ADI is 0 ~ 25mg / kg, due to the added amount of parabens only sorbic acid, benzoic acid 1/10 ~ 1/5, it is much higher than the relative safety of sorbic acid . Sales price: 50 / kg