Substance profile
Imidazole
Imidazole is monoclinic prisms from benzene with an amine-like odor.
01 · Identification
What Imidazole is
Imidazole is monoclinic prisms from benzene with an amine-like odor. Its molecular formula is C3H4N2 and its molecular weight is 68.08 g/mol. It boils at 257 °C, melts at 89.5 °C, is very soluble in water.
Under the GHS it carries the signal word Danger.
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
| Code | Hazard statement |
|---|---|
| H360D | May damage the unborn child. |
| H302 | Harmful if swallowed. |
| H314 | Causes severe skin burns and eye damage. |
Precautionary statements: P260, P270, P280, P301, P310, P312, P330, P331
03 · Physical and chemical properties
Imidazole properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 257 °C (494.6 °F) | HSDB | |
| 268 °C (514.4 °F) | ICSC | ||
| 257 °C (494.6 °F) | at 760 mmHg | DOE PAC | |
| Melting point | 89.52 °C (193.1 °F) | HSDB | |
| 89 °C (192.2 °F) | ICSC | ||
| 90.5 °C (194.9 °F) | HMDB | ||
| Density | 1.03 g/cm³ | ICSC | |
| 1.0303 g/cm³ | at 101 °C | HSDB | |
| Solubility | Very soluble in water | HSDB | |
| In water, 241 g/100 g at 20 °C | at 20 °C | HSDB | |
| In water, 2060 g/kg H2O at 19 °C | at 19 °C | HSDB | |
| Vapor pressure | 0.0023 mmHg | at 20 °C | ICSC |
| 0.0025 mmHg | at 25 °C | HSDB | |
| 0.002 mmHg | Haz-Map | ||
| Flash point | 145 °C (293 °F) | HSDB | |
| Autoignition temperature | 480 °C (896 °F) | HSDB | |
| Lower explosive limit (LEL) | Dust explosion possible if in powder or granular form, mixed with air. | HSDB | |
| Vapor density | 2.35 (air = 1) | ICSC |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Imidazole
Storage conditions
Keep container tightly closed in a dry and well-ventilated place. Storage class (TRGS 510): 6.1D: Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Incompatible materials: acids, acid anhydrides, strong oxidizing agents.
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check Imidazole in the storage compatibility matrix →