Substance profile
2-Methylaziridine
2-Methylaziridine is colorless, oily liquid with odor like aliphatic amines.
01 · Identification
What 2-Methylaziridine is
2-Methylaziridine is colorless, oily liquid with odor like aliphatic amines. Its molecular formula is C3H7N and its molecular weight is 57.09 g/mol. It boils at 67 °C, melts at -65 °C.
Under the GHS it carries the signal word Danger. It is classed as hazardous Air Pollutants (HAPs).
Other names for 2-Methylaziridine
- propyleneimine
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 |
|---|---|
| H225 | Highly flammable liquid and vapour. |
| H350 | May cause cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H310 | Fatal in contact with skin. |
| H330 | Fatal if inhaled. |
| H300 | Fatal if swallowed. |
| H318 | Causes serious eye damage. |
| H411 | Toxic to aquatic life with long lasting effects. |
Precautionary statements: P201, P210, P233, P241, P242, P260, P270, P271, P273, P280, P301, P302, P304, P305, P308, P310, P313, P330, P338, P352, P391, P403, P501
03 · Physical and chemical properties
2-Methylaziridine 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 | 67 °C (152.6 °F) | HSDB | |
| 66.67 °C (152 °F) | NIOSH | ||
| Melting point | -65 °C (-85 °F) | HSDB | |
| Density | 0.8 g/cm³ | NIOSH | |
| 0.8054 g/cm³ | range, midpoint shown, at 25 °C | HSDB | |
| Solubility | In water, miscible in all proportions | HSDB | |
| Soluble in ethanol | HSDB | ||
| Soluble in most organic solvents | HSDB | ||
| Vapor pressure | 112 mmHg | NIOSH | |
| 112 mmHg | at 20 °C | CAMEO | |
| 140 mmHg | at 25 °C | HSDB | |
| Flash point | -3.9 °C (25 °F) | HSDB | |
| -3.89 °C (25 °F) | NIOSH | ||
| Lower explosive limit (LEL) | Class IB Flammable Liquid: Fl.P. below 73 °F and BP at or above 100 °F. | NIOSH | |
| Vapor density | 2 (air = 1) | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling 2-Methylaziridine
Storage conditions
PRECAUTIONS FOR "CARCINOGENS": Storage site should be as close as practicable to lab in which carcinogens are to be used, so that only small quantities required for ... expt need to be carried. Carcinogens should be kept in only one section of cupboard, an explosion-proof refrigerator or freezer (depending on chemicophysical properties ...) that bears appropriate label. An inventory ... should be kept, showing quantity of carcinogen & date it was acquired ... Facilities for dispensing ... should be contiguous to storage area. /Chemical Carcinogens/
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Can react vigorously with oxidizing materials. Polymerizes explosively on exposure to acids or acid fumes.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
PROPYLENEIMINE is subject to violent polymerization on contact with an acid. (The inhibitor is intended to prevent polymerization). Incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen is generated in combination with strong reducing agents, such as hydrides.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check 2-Methylaziridine in the storage compatibility matrix →