Substance profile
Hexachlorobenzene
Hexachlorobenzene is white needles.
01 · Identification
What Hexachlorobenzene is
Hexachlorobenzene is white needles. Its molecular formula is C6Cl6 and its molecular weight is 284.8 g/mol. It boils at 325 °C, melts at 229 °C.
Under the GHS it carries the signal word Danger. It is classed as hazardous Air Pollutants (HAPs).
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>. |
| H372 | Causes damage to organs <or state all organs affected, if known> through prolonged or repeated exposure <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P201, P260, P270, P273, P280, P308, P313, P314, P391, P501
03 · Physical and chemical properties
Hexachlorobenzene 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 | 325 °C (617 °F) | HSDB | |
| 322.22 °C (612 °F) | OSHA | ||
| 325 °C (617 °F) | at 760 mmHg | DOE PAC | |
| Melting point | 228.83 °C (443.9 °F) | HSDB | |
| 200 °C (392 °F) | Technical product | HSDB | |
| 231 °C (447.8 °F) | ICSC | ||
| Density | 2 g/cm³ | ICSC | |
| 2.044 g/cm³ | at 23 °C | HSDB | |
| 2.044 g/cm³ | at 24 °C | CAMEO | |
| Solubility | Sparingly soluble in cold alcohol; soluble in benzene, chloroform, and ether | HSDB | |
| Soluble in carbon disulfide; sparingly soluble in carbon tetrachloride | HSDB | ||
| In water, 4.7X10-3 mg/L at 25 °C | at 25 °C | HSDB | |
| Vapor pressure | 0.000007501 mmHg | at 20 °C | ICSC |
| 0.0000172 mmHg | at 25 °C | HSDB | |
| 1 mmHg | at 114.39 °C | CAMEO | |
| Flash point | 242 °C (467.6 °F) | closed cup | HSDB |
| 242.22 °C (468 °F) | CAMEO | ||
| 242 °C (467.6 °F) | ICSC | ||
| Vapor density | 9.83 (air = 1) | HSDB | |
| 9.8 (air = 1) | CAMEO |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Hexachlorobenzene
Storage conditions
Separated from food and feedstuffs. Well closed.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
DIMETHYL FORMAMIDE AND HEXACHLOROBENZENE REACT VIOLENTLY ABOVE 65 °C.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
HEXACHLOROBENZENE reacts violently with dimethylformamide. (NTP, 1992).
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Hexachlorobenzene in the storage compatibility matrix →