无码日韩精品一区二区免费暖暖_日韩人妻无码精品久久_狂躁美女大bbbbbb视频u_亚洲精品一区二区三区在线观看_自拍偷自拍亚洲精品播放

SZSE:002741
Chemical Reagents
Methyl 4-hydroxybenzoateCOA Report
  • CAS No.:99-76-3
  • Molecular weight:152.14
  • Aliases:Methyl paraben; Methyl p-hydroxybenzoate; 4-(Methoxycarbonyl)phenol; 4-Hydroxybenzoic acid methyl ester; 4-(Carbomethoxy)phenol;
  • Molecular formula:C8H8O3
  • EC No.:202-785-7
Information
Specification category:
Product No. Product name specifications
1.19280.010 Methyl 4-hydroxybenzoate CP100g
Characteristic: Appearance and properties:Colorless crystals or white crystalline powder, odorless or slight pungent odor.
Melting point(℃): 125-128
Boiling point(℃): 270-280(Decomposition)
Concentration: pure
Solubility: disoluble?in water,Slightly soluble in Benzene, carbon tetrachloride, soluble in alcohol, ether, acetone.
Technical indicators:
Item AR CP
Assay(C8H8O3) ≥99.0% ≥98.5%
Melting point(℃) 126~128 125~128
Solubility in dthanol Pass ----
pH value(50g/L,25℃) 4.0~7.0 4.0~7.0
Residue on ignition (as SO4) ≤0.05% ≤0.1%
Chloride(Cl) ≤0.001% ≤0.001%
Sulfate(SO4) ≤0.005% ≤0.01%
Iron(Fe) ≤0.005% --
Related Products

Copyright ? Guangdong?Guanghua?Sci-Tech?Co.,?Ltd. GuangDong ICP No. 14033791-1
美女福利一区二区三区| 深夜放纵内射少妇| 一本加勒比hezyo无码专区| 一区二区三区无码免费看| 国产又粗又猛又大爽又黄| 狠狠爱五月丁香亚洲综| 欧美性生交大片免费看| 精品国内自产拍在线观看| 色偷偷亚洲第一成人综合网址| 最新精品国偷自产在线| 人妻饥渴偷公乱中文字幕| 亚洲国产国语对白在线字幕| 玩弄少妇人妻| 国产精品人人做人人爽| 一区二区三区无码视频免费福利 | 俺来也俺去啦久久综合网 | 亚洲中文字幕无码久久2017| 中文字幕人妻熟女人妻| 国产午夜精品亚洲精品| 日本黄网站三级三级三级| 欧美人与禽猛交狂配| 国产爱豆剧传媒在线观看| 成人欧美一区二区三区在线观看 | 久久av无码精品人妻出轨| 电影内射视频免费观看| 国产亚洲精品拍拍拍拍拍| 亚洲一区二区三区成人网站| 蜜臀av在线播放| 精品偷拍被偷拍在线观看| 精品国产三级a∨在线欧美| 国产精品v欧美精品v日韩精品| 黑人30厘米少妇高潮全部进入| 亚洲精品国语中文字幕| 国产偷人爽久久久久久老妇app | 国产乱人对白| 少妇荡乳情欲办公室456视频| 亚洲日韩亚洲另类激情文学| 亚洲精品国产suv| 日本少妇喷水一区二区| 熟女人妻av五十路六十路| 无码高潮少妇毛多水多水免费|