Methylparaben NEW

Application: Paraben methyl ester, also known as hydroxyphenylate, Paraben lipids were initially used as food preservatives, and after a series of exploration and research, they were introduced into cosmetics as preservatives. Hydroxyphenylate has a strong antibacterial effect, the most prominent of which is the antibacterial ability of mold and yeast, but the effect of some bacteria (gram-negative bacteria, lactic acid bacteria) is poor, so it is often used with other preservatives in cosmetics.

Content analysis: Method 1 was determined according to the content analysis method of "butyl p-hydroxybenzoate (07002)". Each mLImol/L sodium hydroxide is equivalent to 152.2mg of this product (C8H8O3). Method 2 The sample of 0.1g(accurate to lmg) was dried on silica gel for 5h in advance and transferred into a 300ml flask with glass stopper. Add 10ml lmol/L sodium hydroxide and heat it in a water bath for 15min. After cooling, 0.1mol/L potassium bromate 50.00ml, potassium bromate 5.0g and lmol/L hydrochloric acid 30ml were added. After tampering, place in a dark room for 15min. Add 1g potassium iodide, shake the flask violently, titrate with 0.1mol/L sodium thiosulfate, and use starch test solution (TS-235) as an indicator. 0.1mol/L potassium bromate per mlis equivalent to 25.36mg of this product (C8H8O3).