792527
咪唑
anhydrous grade, ACS reagent grade, ≥99%, Redi-Dri™, free-flowing, solid
别名:
1,3-二氮杂-2,4-环戊二烯, 甘恶啉
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关于此项目
经验公式（希尔记法）:
C3H4N2
化学文摘社编号:
分子量:
68.08
NACRES:
NA.21
PubChem Substance ID:
UNSPSC Code:
12352100
EC Number:
206-019-2
MDL number:
Beilstein/REAXYS Number:
103853
产品名称
咪唑, anhydrous, free-flowing, Redi-Dri™, ACS reagent, ≥99%
InChI key
RAXXELZNTBOGNW-UHFFFAOYSA-N
InChI
1S/C3H4N2/c1-2-5-3-4-1/h1-3H,(H,4,5)
SMILES string
c1c[nH]cn1
grade
ACS reagent
anhydrous
vapor pressure
<1 mmHg ( 20 °C)
product line
Redi-Dri™
assay
≥99%
form
solid
quality
free-flowing
impurities
≤0.2% water
ign. residue
≤0.1%
pH
9.5-11.0 (25 °C, 5% in H2O)
pKa (25 °C)
6.95
bp
256 °C (lit.)
mp
88-91 °C (lit.)
cation traces
Fe: ≤0.001%
Quality Level
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Application
咪唑由于具有两性性质和快速的质子转移能力，可作为质子转移试剂用于多孔有机聚合物合成。
咪唑作为催化剂的用途：
咪唑作为催化剂的用途：
- 在氯硅烷/DMF存在下，醇、羧酸和胺类物质的硅烷化反应。
- 羧酸和光气制备相应酰氯。
- 咪唑-PPh3/I2催化体系用于醇变为碘化物的转换反应。
- 咪唑-PPh3/I2用于二醇脱氧反应。
特别适用于 pH 6.2-7.8 范围内的缓冲液
Legal Information
Redi-Dri is a trademark of Sigma-Aldrich Co. LLC
signalword
Danger
hcodes
Hazard Classifications
Acute Tox. 4 Oral - Eye Dam. 1 - Repr. 1B - Skin Corr. 1C
存储类别
6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
wgk
WGK 2
flash_point_f
293.0 °F - closed cup
flash_point_c
145 °C - closed cup
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商品
Redi-Dri™ prevents hygroscopic powders, such as inorganic salts, from absorbing moisture and forming clumps, leaving the salts free-flowing every time.
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