Substance profile
1,2-Dichlorobenzene
1,2-Dichlorobenzene is a colorless liquid with a pleasant odor.
01 · Identification
What 1,2-Dichlorobenzene is
1,2-Dichlorobenzene is a colorless liquid with a pleasant odor. It boils at 180 °C, melts at -16.7 °C, is miscible with water.
Under the GHS it carries the signal word Warning. It is classed as flammable agents - 2nd degree.
Other names for 1,2-Dichlorobenzene
- o-dichlorobenzene
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 |
|---|---|
| H302 | Harmful if swallowed. |
| H335 | May cause respiratory irritation. |
| H315 | Causes skin irritation. |
| H319 | Causes serious eye irritation. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P264, P270, P273, P280, P301, P302, P305, P312, P313, P330, P332, P337, P338, P352, P391, P501
03 · Physical and chemical properties
1,2-Dichlorobenzene 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 | 180.1 °C (356.2 °F) | at 760 mmHg | HSDB |
| 180.56 °C (357 °F) | NIOSH | ||
| 180.5 °C (356.9 °F) | at 760 mmHg | CAMEO | |
| Melting point | -16.7 °C (1.9 °F) | HSDB | |
| -17.22 °C (1 °F) | NIOSH | ||
| Density | 1.3 g/cm³ | NIOSH | |
| 1.3047 g/cm³ | at 21.11 °C | HSDB | |
| 1.3059 g/cm³ | at 20 °C | HSDB | |
| Solubility | Miscible with alcohol, ether, benzene. | HSDB | |
| 0.01% | NIOSH | ||
| In water, 156 mg/L at 25 °C | at 25 °C | HSDB | |
| Vapor pressure | 1 mmHg | NIOSH | |
| 1 mmHg | at 20 °C | CAMEO | |
| 1.36 mmHg | at 25 °C | HSDB | |
| Flash point | 66.11 °C (151 °F) | HSDB | |
| 68 °C (154.4 °F) | HSDB | ||
| Autoignition temperature | 648 °C (1198.4 °F) | HSDB | |
| 647.78 °C (1198 °F) | CAMEO | ||
| Lower explosive limit (LEL) | 2.2 % by volume | HSDB | |
| Upper explosive limit (UEL) | 9.2 % by volume | HSDB | |
| Vapor density | 5.05 (air = 1) | HSDB | |
| 5.1 (air = 1) | ICSC | ||
| Odor threshold | Odor threshold low= 12.0 mg/cu-m, Odor threshold high= 300.0 mg/cu-m, Irritating concentration= 150.0 mg/cu-m (From table). | HSDB | |
| Odor threshold : 1.8 mg/cu m | HSDB | ||
| Critical temperature and pressure | 417.2 °C (783 °F) | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Source notes
Further notes on 1,2-Dichlorobenzene
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.
Odor
Odor of o-dichlorobenzene is detectable by avg person at 50 ppm in air. Odor becomes strong & irritation noticeable at ... concn around 100 ppm. It has fair warning properties at this level but possibility of adaptation should be recognized.
Source: HSDB
05 · Handling and storage
Storing and handling 1,2-Dichlorobenzene
Storage conditions
Store in cool, dry, well-ventilated location. Separate from oxidizing materials.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Strong oxidizers, aluminum, chlorides, acids, acid fumes.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
O-DICHLOROBENZENE is sensitive to prolonged exposure to light. This chemical can react vigorously with oxidizers. It is incompatible with aluminum and aluminum alloys. It attacks some forms of plastics, rubber and coatings. (NTP, 1992).
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check 1,2-Dichlorobenzene in the storage compatibility matrix →