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I2399

Sigma-Aldrich

Imidazole

ACS reagent, ≥99% (titration)

Synonym(s):
1,3-Diaza-2,4-cyclopentadiene, Glyoxaline
Empirical Formula (Hill Notation):
C3H4N2
CAS Number:
Molecular Weight:
68.08
Beilstein:
103853
EC Number:
MDL number:
eCl@ss:
39161001
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent

Quality Level

vapor pressure

<1 mmHg ( 20 °C)

Assay

≥99% (titration)

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%

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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I5513RDD039IX0005
Imidazole ACS reagent, &#8805;99% (titration)

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Imidazole for molecular biology, &#8805;99% (titration)

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Imidazole for molecular biology, &#8805;99% (titration), free-flowing, Redi-Dri&#8482;

Sigma-Aldrich

RDD039

Imidazole

Imidazole Meets ACS Specifications, Meets Reagent Specifications for testing USP/NF monographs GR ACS

Sigma-Aldrich

IX0005

Imidazole

assay

≥99% (titration)

assay

≥99% (titration)

assay

≥99% (titration)

assay

≥99%

bp

256 °C (lit.)

bp

256 °C (lit.)

bp

256 °C (lit.)

bp

256 °C/1013 hPa

mp

88-91 °C (lit.)

mp

88-91 °C (lit.)

mp

88-91 °C (lit.)

mp

90 °C

Quality Level

200

Quality Level

200

Quality Level

100

Quality Level

-

grade

ACS reagent

grade

for molecular biology

grade

for molecular biology

grade

-

vapor pressure

<1 mmHg ( 20 °C)

vapor pressure

<1 mmHg ( 20 °C)

vapor pressure

<1 mmHg ( 20 °C)

vapor pressure

0.003 hPa ( 20 °C)

General description

Imidazole is a five-membered heterocycle that is found in many naturally occurring compounds. It exhibits both acidic and basic properties. It is reported to be an inhibitor of thromboxane formation. Its vertical spectrum and the radiationless decay have been recorded and analyzed.

Application

Excellent for buffers in the range of pH 6.2-7.8

Legal Information

Redi-Dri is a trademark of Sigma-Aldrich Co. LLC

Signal Word

Danger

Hazard Statements

Hazard Classifications

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

Storage Class Code

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

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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