Hexamethylenediamine — properties & hazards overview
Boiling point
≈ 204 °C
Melting point
≈ 42 °C
Vapour pressure (20 °C)
< 0.1 hPa (low)
Water solubility
Miscible
Flammability
Combustible liquid
Toxicity
Corrosive vapour
Chronic risk
Sensitization possible
Environmental
Toxic to aquatic life
| Property | Value / Note |
|---|---|
| Physical state | Colourless to pale-yellow hygroscopic liquid or low-melting solid with strong ammonia/amine odour. |
| Density (20 °C) | ≈ 0.88 g/cm³ |
| Odour threshold | Low (detectable at a few ppm); intense irritant at higher concentrations. |
| Reactivity | Strong base; reacts with acids to form salts, with oxidants to give exothermic reactions; attacks copper and zinc. |
| Typical sources | Polyamide (nylon-6,6) manufacturing, epoxy curing agents, polyurethane additives, amine neutralization or vent gases. |
| Typical analytical detection | FTIR (NH₂ stretching, real-time gas); FID (after oxidation to CO₂); PID (screening if vapour present); NDIR (limited selectivity, high ppm); Amine-specific colorimetric tubes (spot checks); Dust analysis for condensed or neutralized aerosols. |
*Indicative data; confirm with SDS and process-specific emission characterization.