Methyl Paraben｜99-76-3
Huahana Huahana
ʻO ka Methyl paraben, a me ka mEthyl Paraben, kekahi o nā parabens, he mea mālama me ke ʻano kemika CH3(C6H4(OH)COO).ʻO ia ka methyl ester o ka p-hydroxybenzoic acid.
ʻAno: he pauda keʻokeʻo keʻokeʻo a i ʻole ke aniani.115-118 ° C melting point, boiling point, 297-298 ° C. Soluble in ethanol, ethyl ether and acetone, micro-soluble in water, chloroform, carbon disulfide and petroleum ether.ʻO ka ʻala kūikawā liʻiliʻi a me ka ʻono, ka ʻono ʻawaʻawa, Zhuo Ma.
Hoʻomākaukau: p-hydroxybenzoic acid a me ka ethanol i ke alo o ka sulfuric acid catalyst no ka esterification, esterification i ka wai ma hope o ka pau ʻana o ka crystallization, a laila ma o kahi kānana, i nā huahana pickling.: nā mea waena kūlohelohe.No nā Preservatives, antimicrobial agent, hoʻohana ʻia i ka meaʻai, nā mea hoʻonaninani a me nā lāʻau lapaʻau.Hoʻohana pū ʻia no ka nānā ʻana i nā reagents organik.ʻO nā waiwai ma ka mold, yeast a me ka bacteria he ākea antibacterial hopena, yeast a me ka mold i ke kuleana o kahi ikaika, akā no ka bacteria Gram-negative bacilli a me ke kuleana o Lactobacillus poor.ʻO nā meaʻai a me nā lāʻau lapaʻau e mālama pono i nā fungicides.
Hōʻike
| MEA | OLELO HOOLAHA |
| Ka nana aku | ʻO ka pauka kristal keʻokeʻo |
| Maemae | >= 99.0% |
| Lae hehee | 125- 128 |
| Ke koena ma ka ʻā | =< 0.1% |
| Kaʻakika (mg/g) | 4.0- 7.0 |
| Nā mea pili | =< 0.5% |
| ʻIkepili | Hoʻohālike |
| Maopopo o ka hoʻonā | Akaka a maopopo |
| Metala kaumaha (e like me Pb) | =< 10 ppm |
