Methyl Paraben - 99-76-3
Kufotokozera Zamalonda
Methyl paraben, komanso mEthyl Paraben, imodzi mwa parabens, ndi yosungiramo mankhwala okhala ndi formula CH3(C6H4(OH)COO). Ndi methyl ester ya p-hydroxybenzoic acid.
Chilengedwe: ufa wa crystalline woyera kapena crystalline. 115-118 ° C kusungunuka, malo otentha, 297-298 ° C. Zosungunuka mu ethanol, ethyl ether ndi acetone, micro-sungunuka m'madzi, chloroform, carbon disulfide ndi petroleum ether. Kununkhira kwakung'ono kwapadera ndi kukoma, kukoma kowawa pang'ono, Zhuo Ma.
Kukonzekera: p-hydroxybenzoic acid ndi Mowa pamaso pa sulfuric asidi chothandizira kwa esterification, esterification m'madzi akamaliza crystallization, ndiye kupyolera fyuluta, mu pickling mankhwala.: organic intermediates. Pakuti Preservatives, antimicrobial wothandizira, ntchito chakudya, zodzoladzola ndi mankhwala. Amagwiritsidwanso ntchito posanthula ma organic reagents. The katundu nkhungu, yisiti ndi mabakiteriya ndi yotakata antibacterial zotsatira, yisiti ndi nkhungu ndi udindo wa amphamvu, koma makamaka mabakiteriya Gram-negative bacilli ndi udindo wa Lactobacillus osauka. Zakudya ndi mankhwala moyenera kuteteza fungicides.
Kufotokozera
ITEM | KULAMBIRA |
Maonekedwe | White crystalline ufa |
Chiyero | = 99.0% |
Malo osungunuka | 125-128 |
Zotsalira pakuyatsa | =< 0.1% |
Acidity (mg/g) | 4.0-7.0 |
Zogwirizana nazo | =< 0.5% |
Chizindikiritso | Gwirizanani |
Kumveka kwa yankho | Zomveka komanso zowonekera |
Chitsulo cholemera (monga Pb) | =<10ppm |