Substance profile
Hydrazobenzene
Hydrazobenzene is a tablets from alcohol and ether.
01 · Identification
What Hydrazobenzene is
Hydrazobenzene is a tablets from alcohol and ether. Its molecular formula is C12H12N2 and its molecular weight is 184.24 g/mol. It boils at 293 °C, melts at 131 °C.
Under the GHS it carries the signal word Danger. It is classed as hazardous Air Pollutants (HAPs).
Other names for Hydrazobenzene
- 1,2-diphenylhydrazine
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 |
|---|---|
| H350 | May cause cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H302 | Harmful if swallowed. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P201, P270, P273, P280, P301, P308, P312, P313, P330, P391, P501
03 · Physical and chemical properties
Hydrazobenzene 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 | 293 °C (559.4 °F) | at 760 mmHg | HSDB |
| Decomposes (NTP, 1992) | decomposes | CAMEO | |
| Melting point | 131.11 °C (268 °F) | CAMEO | |
| 131 °C (267.8 °F) | DOE PAC | ||
| 131 °C (267.8 °F) | decomposes | HSDB | |
| Density | 1.16 g/cm³ | ICSC | |
| 1.158 g/cm³ | at 16.11 °C | CAMEO | |
| 1.158 g/cm³ | at 16 °C | HSDB | |
| Solubility | Slightly sol in benzene, deuterated dimethyl sulfoxide; insol in acetic acid; very soluble in ethanol | HSDB | |
| Solubility in water, g/100ml at 20 °C: | at 20 °C | ICSC | |
| In water, 221 mg/L at 25 °C | at 25 °C | HSDB | |
| Vapor pressure | 0.00044 mmHg | at 25 °C | HSDB |
| 0.00044 mmHg | Haz-Map |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Hydrazobenzene
Storage conditions
PRECAUTIONS FOR "CARCINOGENS": Storage site should be as close as practicable to lab in which carcinogens are to be used, so that only small quantities required for ... expt need to be carried. Carcinogens should be kept in only one section of cupboard, an explosion proof refrigerator or freezer (depending on chemicophysical properties ...) that bears appropriate label. An inventory ... should be kept, showing quantity of carcinogen & date it was acquired ... Facilities for dispensing ... should be contiguous to storage area. /Chemical Carcinogens/
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
Toxic gases may be formed by mixing DIPHENYLHYDRAZINE 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 Hydrazobenzene in the storage compatibility matrix →