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I0250

Sigma-Aldrich

Imidazole

≥99% (titration), crystalline

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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.25

vapor pressure

<1 mmHg ( 20 °C)

Assay

≥99% (titration)

form

crystalline

impurities

≤0.005% Fluorescence blank (β-NADH equivalence.)

color

white

pH

6.2-7.8 (25 °C)

pKa (25 °C)

6.95

bp

256 °C (lit.)

mp

88-91 °C (lit.)

solubility

water: 500 mg/mL, clear, colorless to very faintly yellow

storage temp.

room temp

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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This Item
I55135674956748
Imidazole &#8805;99% (titration), crystalline

Sigma-Aldrich

I0250

Imidazole

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

Sigma-Aldrich

I5513

Imidazole

-
Imidazole BioUltra, &#8805;99.5% (GC)

Sigma-Aldrich

56749

Imidazole

Premium Grade
Imidazole BioUltra, for molecular biology, &#8805;99.5% (GC)

Sigma-Aldrich

56748

Imidazole

Premium Grade
form

crystalline

form

crystalline powder

form

powder or crystals

form

flakes, powder or crystals

impurities

≤0.005% Fluorescence blank (β-NADH equivalence.)

impurities

-

impurities

insoluble matter, passes filter test, ≤0.2% water

impurities

DNases, none detected, RNases, none detected, insoluble matter, passes filter test, phosphatases, none detected, proteases, none detected, ≤0.2% water

color

white

color

-

color

-

color

-

pH

6.2-7.8 (25 °C)

pH

6.2-7.8 (25 °C)

pH

9.5-11.0 (25 °C, 0.1 M in H2O)

pH

9.5-11.0 (25 °C, 0.1 M in H2O)

mp

88-91 °C (lit.)

mp

88-91 °C (lit.)

mp

88-91 °C (lit.)

mp

88-91 °C (lit.)

Application

Excellent for buffers in the range of pH 6.2-7.8

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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Protocols

Sildenafil Citrate USP Method Using HPTLC Plates for the Limit of Imidazole Test

In the present study we demonstrate compliance of silica gel 60 F254 HPTLC plates with USP requirements, and how HPTLC plates are suitable for the Sildenafil citrate-Limit of Imidazole test.

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