Substance profile
Isobenzan
Isobenzan is a whitish to light brown powder.
01 · Identification
What Isobenzan is
Isobenzan is a whitish to light brown powder. Its molecular formula is C9H4Cl8O and its molecular weight is 411.7 g/mol. It melts at 121 °C.
Under the GHS it carries the signal word Danger.
Other names for Isobenzan
- isobenzan (ISO)
- 1,3,4,5,6,7,8,8-octachloro-1,3,3a,4,7,7a-hexahydro-4,7-methanoisobenzofuran
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 |
|---|---|
| H310 | Fatal in contact with skin. |
| H300 | Fatal if swallowed. |
| H400 | Very toxic to aquatic life. |
Precautionary statements: P270, P273, P280, P301, P302, P310, P330, P352, P391, P501
03 · Physical and chemical properties
Isobenzan 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 | 121 °C (249.8 °F) | range, midpoint shown | HSDB |
| 121.11 °C (250 °F) | range, midpoint shown | CAMEO | |
| Density | 1.87 g/cm³ | HSDB | |
| 1.87 g/cm³ | at 25 °C | DOE PAC | |
| Solubility | Sol in ether, acetone, benzene, xylene, heavy aromatic naphtha | HSDB | |
| Greater than 1% in ethanol & kerosene | HSDB | ||
| Vapor pressure | 0.000003 mmHg | at 20 °C | HSDB |
| 0.00000292 mmHg | at 20 °C | HSDB | |
| 0.00001 mmHg | at 25 °C | CAMEO | |
| Lower explosive limit (LEL) | Non-flammable and non-explosive. (EPA, 1998) | CAMEO | |
| Upper explosive limit (UEL) | Non-flammable and non-explosive. (EPA, 1998) | CAMEO |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Source notes
Further notes on Isobenzan
These are descriptions rather than measured values, so they are kept out of the table above and quoted here with the source that reported them.
Solubility
25 g/100 ml acetone at 25 °C, 38 g/100 ml benzene at 25 °C, 34 g/100 ml carbon tetrachloride at 25 °C, 2 g/100 ml fuel oil at 25 °C, 34 g/100 ml toluene at 25 °C, 29 g/100 ml xylene at 25 °C.
Source: HSDB
05 · Handling and storage
Storing and handling Isobenzan
Reactivity
Chlorine is evolved when ISOBENZAN is heated above 410F. Avoid acids, certain metal salts, and catalytically active carriers. [EPA, 1998].
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Isobenzan in the storage compatibility matrix →