日本色com,国产粗大脏话操逼av,综合色图在线,亚洲一级黄色网,日韩精品丝袜神乳,黄色一类片永久视频,黄色毛片完整版,欧美一级特黄做受又粗又大,天天操天天操天天操天天操天天操天天操 ,涩涩中文字幕在线观看

























N,N'-Carbonyldiimidazole



intro:
Product Name: N,N'-Carbonyldiimidazole
Alias : CDI

羰基咪唑

1,1'-Carbonyl diimidazole; CDI
Molecular Formula: C7H6N4O          
Molecular Weight: 162.15
CAS RN: 530-62-1    
EINECS RN: 208-488-91
1. Properties & Use
Appearance: white crystal, m.p.: 117～122℃. Can generate imidazole and carbon dioxide in water.
soluble in ethanol, toluene, ethyl acetate, slightly soluble in aldehyde, dutch liquid, tetrahydrofuran.
Use: As condensating agent for the synthesis of nucleoside triphosphate, peptide and other esters; as intermediate for the synthesis of acylimidazole etc.
2. Quality Spec.
Item
Details
Testing method
Appearance
white or similar to white powder
visual study
Assay     ≥  %
98
HPLC
m.p.:      ℃
115~122
DIGITAL MELTING-POINT APPARATUS
Toluene solubility test
qualified
soluble in toluene
3. Packing
In cardboard drum lined with plastic bag, 25kg, 20kg, 10kg, or upon clients' demand.

 





?