I2399

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I2399

Sigma-Aldrich

 

Imidazole

ACS reagent, ≥99% (titration)

Synonym:1,3-Diaza-2,4-cyclopentadiene, Glyoxaline
CAS Number:288-32-4
Linear Formula:C3H4N2
Molecular Weight:68.08
Beilstein Registry Number:103853
EC Number:206-019-2
MDL number:MFCD00005183
PubChem Substance ID:24895975

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Reviews

Description

ApplicationExcellent for buffers in the range of pH 6.2-7.8

Properties

gradeACS reagent
vapor pressure<1 mmHg ( 20 °C)
assay≥99% (titration)
total impurities≤0.2% water
ign. residue ≤0.1%
pH9.5-11.0 (25 °C, 5% in solution)
pKa (25 °C)6.95
bp256 °C(lit.)
mp88-91 °C(lit.)
cation tracesFe: ≤0.001%

Safety

Personal Protective EquipmentEyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges
Hazard CodesC
Risk Statements22-34
Safety Statements26-36/37/39-45
RIDADRUN2923 8/PG 3
WGK Germany1
RTECSNI3325000
Flash Point(F)293 °F
Flash Point(C)145 °C

References

referenceR. Breslow, Review: As RNase model. Acc. Chem. Res. 24, 317, (1991)
 B. Storrie, E.A. Madden, Buffer for assay of horseradish peroxidase. Meth. Enzymol. 182, 217, (1990)
MerckMerck 13,4935
BeilsteinBeil. 23,V,4,191
FieserFieser 1,492 / Fieser 2,220
 Aldrich MSDS 1, 1083:B / Corp MSDS 1 (1), 1973:D / FT-IR 2 (3), 3503:B / FT-IR 1 (2), 611:D / FT-NMR 1 (3), 75:B / IR-Spectra (3), 1217:G / IR-Spectra (2), 1060:E / NMR-Reference 2 (2), 484:D / RegBook 1 (2), 2351:A / Sax 6, 1605 / Sigma FT-IR 1 (2), 648:C / Structure Index 1, 371:D:6 / Vapor Phase 3, 1483:C