Substance profile
2-Naphthol
2-Naphthol is white, lustrious, bulky leaflets or white powder with a faint phenol-like odor.
01 · Identification
What 2-Naphthol is
2-Naphthol is white, lustrious, bulky leaflets or white powder with a faint phenol-like odor. Its molecular formula is C10H8O and its molecular weight is 144.17 g/mol. It boils at 285 °C, melts at 122 °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 |
|---|---|
| H332 | Harmful if inhaled. |
| H302 | Harmful if swallowed. |
| H400 | Very toxic to aquatic life. |
Precautionary statements: P260, P270, P271, P273, P301, P304, P312, P330, P391, P501
03 · Physical and chemical properties
2-Naphthol 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 | 285 °C (545 °F) | HSDB | |
| 286 °C (546.8 °F) | at 760 mmHg | DOE PAC | |
| Melting point | 121.6 °C (250.9 °F) | HSDB | |
| 122 °C (251.6 °F) | ICSC | ||
| 123 °C (253.4 °F) | HMDB | ||
| Density | 1.28 g/cm³ | ICSC | |
| 1.28 g/cm³ | at 20 °C | HSDB | |
| 0.581 g/cm³ | at 0 °C | DOE PAC | |
| Solubility | Soluble in alcohol, ether, chloroform, glycerol, oils, alkaline solutions | HSDB | |
| Very soluble in ethanol, ethyl ether; soluble in benzene, chloroform; slightly soluble in ligroin | HSDB | ||
| In water, 7.55X10+2 mg/L at 25 °C | at 25 °C | HSDB | |
| Vapor pressure | 0.0029 mmHg | at 25 °C | HSDB |
| 0.00032 mmHg | at 25 °C | HSDB | |
| 0.015 mmHg | at 25 °C | ICSC | |
| Flash point | 153 °C (307.4 °F) | HSDB | |
| 152.78 °C (307 °F) | HSDB | ||
| Autoignition temperature | 550 °C (1022 °F) | ICSC | |
| Vapor density | 5 (air = 1) | ICSC | |
| Odor threshold | 0.01 ppm - 11.4 ppm | HSDB | |
| Odor Threshold Low: 0.01 [ppm] | Haz-Map | ||
| Odor Threshold High: 11.4 [ppm] | Haz-Map |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling 2-Naphthol
Storage conditions
Conditions for safe storage, including any incompatibilities: Keep container tightly closed in a dry and well-ventilated place. Light sensitive.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Incompatible with antipyrine, camphor, phenol, ferric salts, menthol, potassium permanganate and other oxidizing materials, urethane.
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check 2-Naphthol in the storage compatibility matrix →