..国产精品人人做人人爽_免费毛片搬运工永久发布页_国产无遮挡又黄又爽在线看_嘟嘟嘟影院免费韩国_日韩动漫一区二区三区_日韩三级毛片电影_一级特黄大片大全_蜜桃AV国内精品自在线拍_国产偷情熟女自拍视频_日本熟妇网站大全

Chemical reagent
Urea

Product name

Urea

Specification

Reagent grade

Molecular formula

CO(NH2)2

CAS

57-13-6

H.S. CODE

3102100090

Molecular weight

60.05

Appearance

White crystal powder

Package

25KG Woven bags or fiber drums


Property

     White shape crystallization or white powder. Melting point 132.7 ℃ (breakdown). Soluble in water, alcohol and benzene, slightly soluble in ether, insoluble in trichloromethane

Application:

     Analytics reagents, stabilizer. Also used in organic synthesis.

Test standardGB/T 696-2008

Test items

Specification

AR grade

CP grade

Appearance

White crystal powder

White crystal powder

Assay

99.0%

99.0%

Appearance of solution

Conform

Conform

Water insoluble

0.005%

0.02%

Residue on ignition

0.01%

0.02%

Chloride

0.0003%

0.001%

Sulfate

0.001%

0.005%

Ammonium

0.005%

0.005%

Iron

0.0002%

0.0005%

Heavy metals

0.0002%

0.0005%

Biuret

0.2%

0.4%

Storage

    Store in a cool, dry and well ventilated place. Keep away from incompatible substances. Keep container closed.

Product categories
Copyright Langfang hui's fine chemical co., LTD. All rights reserved 冀ICP備20000901號-1
TOP