Merck
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1.04716

Millipore

Imidazole

buffer substance ACS

Synonym(s):
Imidazole, Glyoxaline, Iminazole
Empirical Formula (Hill Notation):
C3H4N2
CAS Number:
Molecular Weight:
68.08
MDL number:
EC Index Number:
206-019-2

grade

ACS reagent

Quality Level

vapor pressure

0.003 hPa ( 20 °C)

assay

≥99% (perchloric acid titration)

form

solid

autoignition temp.

480 °C

potency

970 mg/kg LD50, oral (Rat)

pH

10.5 (20 °C, 67 g/L in H2O)

bp

256 °C/1013 hPa

mp

90 °C

transition temp

flash point 145 °C

solubility

633 g/L

density

1.233 g/cm3 at 20 °C

bulk density

500‑600 kg/m3

storage temp.

15-25°C

InChI

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

InChI key

RAXXELZNTBOGNW-UHFFFAOYSA-N

Analysis Note

Assay (perchloric acid titration): ≥ 99
Identity (IR-spectrum): conforms
pH-value (5 %, in water): 9.5 - 11.0
Melting point: 90 - 92
UV/VIS Spectrum: conforms
Fe (Iron): ≤ 0.001 %
Sulfated ash: ≤ 0.1
Water (according to Karl Fischer): ≤ 0.2
Corresponts to ACS

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

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