Substance profile
N-Methylaniline
N-Methylaniline is a colorless or slightly yellow liq with a weak, ammonia-like odor.
01 · Identification
What N-Methylaniline is
N-Methylaniline is a colorless or slightly yellow liq with a weak, ammonia-like odor. Its molecular formula is C7H9N and its molecular weight is 107.15 g/mol. It boils at 196 °C, melts at -57 °C, is practically insoluble in water.
Under the GHS it carries the signal word Danger. It is classed as flammable agents - 2nd degree.
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 |
|---|---|
| H331 | Toxic if inhaled. |
| H311 | Toxic in contact with skin. |
| H301 | Toxic if swallowed. |
| H373 | May cause damage to organs <or state all organs affected, if known> through prolonged or repeated exposure <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P260, P270, P271, P273, P280, P301, P302, P304, P310, P314, P330, P352, P391, P501
03 · Physical and chemical properties
N-Methylaniline 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 | 196.25 °C (385.3 °F) | HSDB | |
| 195.56 °C (384 °F) | NIOSH | ||
| 196.28 °C (385.3 °F) | at 760 mmHg | CAMEO | |
| Melting point | -57 °C (-70.6 °F) | HSDB | |
| -57.22 °C (-71 °F) | NIOSH | ||
| Density | 0.99 g/cm³ | NIOSH | |
| 0.989 g/cm³ | at 20 °C | HSDB | |
| Solubility | SOL IN ETHANOL, ETHER, CARBON TETRACHLORIDE | HSDB | |
| Insoluble | NIOSH | ||
| 5624 mg/l @ 25 °C | at 25 °C | HSDB | |
| Vapor pressure | 0.3 mmHg | NIOSH | |
| 0.2993 mmHg | at 20 °C | ICSC | |
| 0.453 mmHg | at 25 °C | HSDB | |
| Flash point | 79.44 °C (175 °F) | HSDB | |
| Lower explosive limit (LEL) | Class IIIA Combustible Liquid: Fl.P. at or above 140 °F and below 200 °F. | NIOSH | |
| Vapor density | 3.7 (air = 1) | HSDB | |
| 3.9 (air = 1) | CAMEO | ||
| Odor threshold | Odor Threshold Low: 1.6 [ppm] | Haz-Map | |
| Odor Threshold High: 2.0 [ppm] | Haz-Map | ||
| Odor threshold from AIHA | Haz-Map | ||
| Critical temperature and pressure | 428 °C (802.4 °F) | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling N-Methylaniline
Storage conditions
IN GENERAL, MATERIALS WHICH ARE TOXIC AS STORED OR WHICH CAN DECOMP INTO TOXIC COMPONENTS...SHOULD BE STORED IN A COOL, WELL-VENTILATED PLACE, OUT OF DIRECT RAYS OF THE SUN, AWAY FROM AREAS OF HIGH FIRE HAZARD, & SHOULD BE PERIODICALLY INSPECTED... INCOMPATIBLE MATERIALS SHOULD BE ISOLATED FROM EACH OTHER.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
CAN REACT WITH OXIDIZING MATERIALS
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
N-METHYLANILINE is an aryl an amine. Neutralizes acids in exothermic reactions to form salts plus water. May be 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 N-Methylaniline in the storage compatibility matrix →