Substance profile
Dichlorvos
Dichlorvos is a colorless liquid with an aromatic odor.
01 · Identification
What Dichlorvos is
Dichlorvos is a colorless liquid with an aromatic odor. Its molecular formula is C4H7Cl2O4P and its molecular weight is 220.97 g/mol. It boils at 234 °C, melts at 83.9 °C.
Under the GHS it carries the signal word Danger. It is classed as hazardous Air Pollutants (HAPs).
Other names for Dichlorvos
- dichlorvos (ISO)
- 2,2-dichlorovinyl dimethyl phosphate
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 |
|---|---|
| H330 | Fatal if inhaled. |
| H311 | Toxic in contact with skin. |
| H301 | Toxic if swallowed. |
| H317 | May cause an allergic skin reaction. |
| H400 | Very toxic to aquatic life. |
Precautionary statements: P260, P261, P270, P271, P272, P273, P280, P301, P302, P304, P310, P313, P330, P333, P352, P391, P501
03 · Physical and chemical properties
Dichlorvos 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 | 234.1 °C (453.4 °F) | at 750 mmHg | HSDB |
| 234 °C (453.2 °F) | at 759.813 mmHg | ICSC | |
| 140 °C (284 °F) | at 20 mmHg (reduced pressure) | HSDB | |
| Melting point | 83.89 °C (183 °F) | CAMEO | |
| -60 °C (-76 °F) | below this value | HSDB | |
| Density | 1.4 g/cm³ | ICSC | |
| 1.415 g/cm³ | at 25 °C | HSDB | |
| Solubility | In water, about 1g/100 mL | HSDB | |
| Slightly soluble in glycerin; miscible with aromatic and chlorinated hydrocarbon solvents and alcohols. | HSDB | ||
| In water, 8.00X10+3 mg/L at 20 °C | at 20 °C | HSDB | |
| Vapor pressure | 0.01 mmHg | NIOSH | |
| 0.012 mmHg | at 20 °C | ICSC | |
| 0.0158 mmHg | at 25 °C | HSDB | |
| Flash point | 100 °C (212 °F) | HSDB | |
| 176.67 °C (350 °F) | HSDB | ||
| 170 °C (338 °F) | ICSC | ||
| Lower explosive limit (LEL) | Class III Combustible Liquid | NIOSH | |
| Moderately flammable, will not ignite easily. (EPA, 1998) | CAMEO | ||
| Upper explosive limit (UEL) | Moderately flammable, will not ignite easily. (EPA, 1998) | CAMEO | |
| Vapor density | 7.6 (air = 1) | ICSC | |
| Corrosivity | Corrosive to iron & mild steel | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Dichlorvos
Storage conditions
Keep container tightly closed in a dry and well-ventilated place. Containers which are opened must be carefully resealed and kept upright to prevent leakage. Recommended storage temperature -20 °C.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Contact with oxidizers may cause the release of phosphorous oxides. Contact with strong reducing agents, such as hydrides, may cause the formation of flammable and toxic phosphine gas. Corrosive to iron, mild steel, some forms of plastics, rubber, and coatings.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
DICHLORVOS is incompatible with strong acids and bases. It is slowly hydrolyzed in acidic media and rapidly hydrolyzed by alkalis. It is corrosive to iron and mild steel. (NTP, 1992). Organophosphates are susceptible to formation of highly toxic and flammable phosphine gas in the presence of strong reducing agents such as hydrides. Partial oxidation by oxidizing agents may result in the release of toxic phosphorus oxides.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Dichlorvos in the storage compatibility matrix →