Methyl Paraben | 99-76-3
Ibicuruzwa bisobanura
Methyl paraben, nayo mEthyl Paraben, imwe muri parabene, ni uburyo bwo kubungabunga imiti ya CH3 (C6H4 (OH) COO). Ni methyl ester ya p-hydroxybenzoic aside.
Kamere: ifu ya kirisiti yera cyangwa kristaline. Ahantu ho gushonga 115-118 ° C, aho batetse, 297-298 ° C. Gushonga muri Ethanol, etil ether na acetone, gushonga mikorobe mumazi, chloroform, carbone disulfide na peteroli ether. Impumuro idasanzwe nuburyohe, uburyohe busharira, Zhuo Ma.
Kwitegura: p-hydroxybenzoic aside na Ethanol imbere ya catalizike ya acide sulfurike yo kwisuzumisha, esterifisation mumazi nyuma yo kurangiza kristu, hanyuma ikayungurura, mugutoragura ibicuruzwa. Koresha: abahuza kama. Kubibungabunga, imiti igabanya ubukana, ikoreshwa mubiribwa, kwisiga no gufata imiti. Ikoreshwa kandi mu gusesengura reagent. Ibicuruzwa bibumbabumbwe, umusemburo na bagiteri bifite ingaruka nini za antibacterial, umusemburo nububiko kugirango bigire uruhare rukomeye, ariko cyane cyane kuri bagiteri Gram-negative bacilli nuruhare rwabakene ba Lactobacillus. Ibiribwa nubuvuzi kubungabunga neza fungiside.
Ibisobanuro
INGINGO | UMWIHARIKO |
Kugaragara | Ifu ya kirisiti yera |
Isuku | > = 99.0% |
Ingingo yo gushonga | 125- 128 |
Ibisigisigi byo gutwikwa | = <0.1% |
Acide (mg / g) | 4.0- 7.0 |
Ibintu bifitanye isano | = <0.5% |
Kumenyekanisha | Hindura |
Igisubizo cyumvikana | Birasobanutse kandi bisobanutse |
Icyuma kiremereye (nka Pb) | = <10 ppm |