1.04716

Imidazole

buffer substance ACS

• Synonym(s): Imidazole, Glyoxaline, Iminazole
• Empirical Formula (Hill Notation): C₃H₄N₂
• CAS Number: 288-32-4
• Molecular Weight: 68.08
• MDL number: MFCD00005183
• UNSPSC Code: 12161703
• EC Index Number: 206-019-2
• NACRES: NB.21

Properties

• grade: ACS reagent
• Quality Level: 200
• 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

Description

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

Safety Information

• pictograms: GHS05,GHS07,GHS08
• 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_germany: WGK 2
• flash_point_f: 293.0 °F - closed cup
• flash_point_c: 145 °C - closed cup