Methylparaben NEW
Price | $30 | $30 |
Package | 1kg | 25kg |
Min. Order: | 1kg |
Supply Ability: | 30 tons |
Update Time: | 2024-03-13 |
Product Details
Product Name: Methylparaben | CAS No.: 99-76-3 |
EC-No.: 202-785-7 | Min. Order: 1kg |
Purity: 99% | Supply Ability: 30 tons |
Release date: 2024/03/13 |
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).
Melting Point | 125-128 °C |
Boiling Point | 298.6 °C |
Density | 1,46g/cm |
Vapor Pressure | 0.000005 hPa (20 °C) |
Refractive Inedx | 1.4447 |
pKa | 280°C |
PH | 5.8 (H2O, 20°C) (saturated solution) |
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- Since: 2020-05-25
- Address: Zhanggeji Village, Fengjiazhai Town, Guangzong County, Xingtai City, Hebei Province
17531190177