Substance profile
1-Naphthylamine
1-Naphthylamine is needles from ethanol (aq) or ether with an ammonia-like odor.
01 · Identification
What 1-Naphthylamine is
1-Naphthylamine is needles from ethanol (aq) or ether with an ammonia-like odor. Its molecular formula is C10H9N and its molecular weight is 143.18 g/mol. It boils at 301 °C, melts at 49.2 °C.
Under the GHS it carries the signal word Warning.
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 |
|---|---|
| H302 | Harmful if swallowed. |
| H411 | Toxic to aquatic life with long lasting effects. |
Precautionary statements: P270, P273, P301, P312, P330, P391, P501
03 · Physical and chemical properties
1-Naphthylamine 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 | 300.7 °C (573.3 °F) | HSDB | |
| 300.56 °C (573 °F) | NIOSH | ||
| 301.11 °C (574 °F) | at 760 mmHg | CAMEO | |
| Melting point | 49.2 °C (120.6 °F) | HSDB | |
| 50 °C (122 °F) | NIOSH | ||
| Density | 1.114 g/cm³ | HSDB | |
| 1.12 g/cm³ | NIOSH | ||
| 1.12 g/cm³ | at 25 °C | CAMEO | |
| Solubility | Crystal powder; becomes bluish on exposure to air and light. Sol in about 27 parts water; sol in alcohol and ether | Hydrochloride | HSDB |
| Sol in chloroform | HSDB | ||
| Freely sol in alcohol and ether | HSDB | ||
| Vapor pressure | 0.004 mmHg | at 20 °C | ICSC |
| 0.0042 mmHg | at 25 °C | HSDB | |
| 1 mmHg | at 104.44 °C | NIOSH | |
| Flash point | 157 °C (314.6 °F) | closed cup | HSDB |
| 157.22 °C (315 °F) | NIOSH | ||
| Autoignition temperature | 460 °C (860 °F) | HSDB | |
| 485 °C (905 °F) | CAMEO | ||
| Lower explosive limit (LEL) | Combustible Solid | NIOSH | |
| Vapor density | 4.93 (air = 1) | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling 1-Naphthylamine
Storage conditions
Keep well closed and protected from light.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Oxidizes in air.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
ALPHA-NAPHTHYLAMINE is incompatible with oxidizing agents. It is also incompatible with nitrous acid. It reduces warm ammoniacal silver nitrate. (NTP, 1992).
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check 1-Naphthylamine in the storage compatibility matrix →