Substance profile
Dichlobenil
Dichlobenil is a white crystalline solid with an aromatic odor.
01 · Identification
What Dichlobenil is
Dichlobenil is a white crystalline solid with an aromatic odor. Its molecular formula is C7H3Cl2N and its molecular weight is 172.01 g/mol. It boils at 270 °C, melts at 145 °C.
Under the GHS it carries the signal word Warning.
Other names for Dichlobenil
- dichlobenil (ISO)
- 2,6-dichlorobenzonitrile
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 |
|---|---|
| H312 | Harmful in contact with skin. |
| H411 | Toxic to aquatic life with long lasting effects. |
Precautionary statements: P273, P280, P302, P312, P352, P391, P501
03 · Physical and chemical properties
Dichlobenil 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 | 270 °C (518 °F) | HSDB | |
| 270 °C (518 °F) | at 760 mmHg | CAMEO | |
| Melting point | 144.5 °C (292.1 °F) | range, midpoint shown | HSDB |
| 145.5 °C (293.9 °F) | range, midpoint shown | CAMEO | |
| Density | 1.3 g/cm³ | ICSC | |
| Solubility | Solubility in water: none | ICSC | |
| In water, 14.6 mg/L at 20 °C | at 20 °C | HSDB | |
| Vapor pressure | 0.00066 mmHg | at 20 °C | HSDB |
| 0.0005475 mmHg | at 20 °C | ICSC | |
| 20.94 mmHg | at 104.44 °C | CAMEO | |
| Flash point | Not Applicable. Not flammable. (USCG, 1999) | CAMEO | |
| Autoignition temperature | Not Applicable. Not flammable. (USCG, 1999) | CAMEO | |
| Lower explosive limit (LEL) | Not Applicable. Not flammable. (USCG, 1999) | CAMEO | |
| Upper explosive limit (UEL) | Not Applicable. Not flammable. (USCG, 1999) | CAMEO | |
| Corrosivity | NON-CORROSIVE | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Source notes
Further notes on Dichlobenil
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
Solubility in solvents (w/v) (approx): acetone 5% at 8 °C; benzene 5% at 8 °C; cyclohexanone 7% at 15-20 °C; ethanol 5% at 8 °C; furfural 7% at 8 °C; methylene chloride 10% at 20 °C; methylethylketone 7% at 15-20 °C; tetrahydrofuran 9% at 8 °C; toluene 4% at 20 °C; xylene 5% at 8 °C.
Source: HSDB
05 · Handling and storage
Storing and handling Dichlobenil
Storage conditions
The shelf life in storage is at least 2 yr when stored in a cool, dry place. In view of its volatility, the product should be packed in tightly closed containers.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Dichlobenil as a suspension in water does not deteriorate. It is compatible with most wettable powder herbicides. Mixing with water soluble fertilizers or emulsifiable herbicides is not recommended.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
A halogenated nitrile. Nitriles may polymerize in the presence of metals and some metal compounds. They are incompatible with acids; mixing nitriles with strong oxidizing acids can lead to extremely violent reactions. Nitriles are generally incompatible with other oxidizing agents such as peroxides and epoxides. The combination of bases and nitriles can produce hydrogen cyanide. Nitriles are hydrolyzed in both aqueous acid and base to give carboxylic acids (or salts of carboxylic acids). These reactions generate heat. Peroxides convert nitriles to amides. Nitriles can react vigorously with reducing agents. Acetonitrile and propionitrile are soluble in water, but nitriles higher than propionitrile have low aqueous solubility. They are also insoluble in aqueous acids.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Dichlobenil in the storage compatibility matrix →