Substance profile
4-Nitrosophenol
4-Nitrosophenol is pale yellow orthorhombic needles, browns @ 126 °c.
01 · Identification
What 4-Nitrosophenol is
4-Nitrosophenol is pale yellow orthorhombic needles, browns @ 126 °c. Its molecular formula is C6H5NO2 and its molecular weight is 123.11 g/mol. It melts at 138 °C.
Under the GHS it carries the signal word Danger.
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 |
|---|---|
| H341 | Suspected of causing genetic defects <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H302 | Harmful if swallowed. |
| H318 | Causes serious eye damage. |
| H411 | Toxic to aquatic life with long lasting effects. |
Precautionary statements: P201, P270, P273, P280, P301, P305, P308, P310, P312, P313, P330, P338, P391, P501
03 · Physical and chemical properties
4-Nitrosophenol 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 |
|---|---|---|---|
| Melting point | 138.06 °C (280.5 °F) | range, midpoint shown | CAMEO |
| Solubility | MODERATELY SOL IN WATER; SOL IN DILUTE ALKALIES GIVING GREEN TO BROWNISH GREEN SOLUTIONS; SOL IN ALC, ETHER, ACETONE | HSDB | |
| SOL IN HOT BENZENE | HSDB | ||
| less than 1 mg/mL at 70 °F (NTP, 1992) | at 21.11 °C | CAMEO | |
| Vapor pressure | 0.15 mmHg | Haz-Map | |
| Lower explosive limit (LEL) | EXPLODES ON CONTACT WITH CONCN ACID, ALKALI, OR FIRE. A TECHNICAL GRADE EXPLODED ON STORAGE. | HSDB | |
| DANGEROUS...EXPLOSION RISK...MAY EXPLODE SPONTANEOUSLY. | HSDB | ||
| NITROSOPHENOL EXPLODES ON HEATING... | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling 4-Nitrosophenol
Reactivity
P-BENZOQUINONE MONOXIME explodes when heated. Explodes on contact with acid, alkali (NTP, 1992).
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check 4-Nitrosophenol in the storage compatibility matrix →