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49128

Imidazole

Name: Imidazole
Brand: SIAL

puriss. p.a., ≥99.5% (GC)

Synonym(s):

1,3-Diaza-2,4-cyclopentadiene, Glyoxaline

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About This Item

Empirical Formula (Hill Notation):

C₃H₄N₂

CAS Number:

288-32-4

Molecular Weight:

68.08

EC Number:

206-019-2

UNSPSC Code:

12352100

PubChem Substance ID:

329757434

Beilstein/REAXYS Number:

103853

MDL number:

MFCD00005183

eCl@ss:

39161001

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vapor pressure

<1 mmHg ( 20 °C)

Quality Level

100

grade

puriss. p.a.

assay

≥99.5% (GC)

form

solid

ign. residue (900 °C)

≤0.1%

pH

9.5-11.0 (25 °C, 50 mg/mL in H₂O)

pKa (25 °C)

6.95

bp

256 °C (lit.)

mp

88-91 °C

anion traces

chloride (Cl^-): ≤50 mg/kg, sulfate (SO₄^2-): ≤50 mg/kg

cation traces

Ca: ≤10 mg/kg, Cd: ≤5 mg/kg, Co: ≤5 mg/kg, Cr: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, K: ≤50 mg/kg, Mg: ≤5 mg/kg, Mn: ≤5 mg/kg, Na: ≤50 mg/kg, Ni: ≤5 mg/kg, Pb: ≤5 mg/kg, Zn: ≤5 mg/kg

SMILES string

c1c[nH]cn1

InChI

1S/C3H4N2/c1-2-5-3-4-1/h1-3H,(H,4,5)

InChI key

RAXXELZNTBOGNW-UHFFFAOYSA-N

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Application

Excellent for buffers in the range of pH 6.2-7.8

pictograms

GHS08,GHS05,GHS07

signalword

Danger

hcodes

H302,H314,H360D

pcodes

P260 - P280 - P301 + P312 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338

Hazard Classifications

Acute Tox. 4 Oral - Eye Dam. 1 - Repr. 1B - Skin Corr. 1C

Storage Class

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

ppe

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges

Regulatory Information

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Chemical communications (Cambridge, England), 49(70), 7714-7716 (2013-07-24)

OvoA is an iron(II) dependent sulfoxide synthase which catalyzes the first step in ovothiol A biosynthesis. This enzyme sulphurizes the C5 position of the imidazole side chain of L-histidine. We report the substrate specificity profile of this catalyst and present

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