Substance profile
Azoxybenzene
Azoxybenzene is pale yellow orthorhombic needles.
01 · Identification
What Azoxybenzene is
Azoxybenzene is pale yellow orthorhombic needles. Its molecular formula is C12H10N2O and its molecular weight is 198.22 g/mol. It melts at 36 °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. |
Precautionary statements: P260, P270, P271, P301, P304, P312, P330
03 · Physical and chemical properties
Azoxybenzene 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 | Decomposes (NTP, 1992) | decomposes | CAMEO |
| Melting point | 36 °C (96.8 °F) | HSDB | |
| 36.11 °C (97 °F) | CAMEO | ||
| Density | 1.159 g/cm³ | at 26 °C | HSDB |
| 1.159 g/cm³ | at 26.11 °C | CAMEO | |
| Solubility | less than 1 mg/mL at 68 °F (NTP, 1992) | at 20 °C | CAMEO |
| INSOL IN WATER; SOL IN ALCOHOL & ETHER; 43.5 G DISSOLVE IN 100 G PETROLEUM ETHER @ 15 °C | at 15 °C | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Azoxybenzene
Storage conditions
MATERIALS WHICH ARE TOXIC AS STORED OR WHICH CAN DECOMPOSE 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, AND SHOULD BE PERIODICALLY INSPECTED... INCOMPATIBLE MATERIALS SHOULD BE ISOLATED...
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
AZOXYBENZENE is an azo compound. Azo, diazo, azido compounds can detonate. This applies in particular to organic azides that have been sensitized by the addition of metal salts or strong acids. Toxic gases are formed by mixing materials of this class with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. Flammable gases are formed by mixing materials in this group with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Azoxybenzene in the storage compatibility matrix →