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).
02 · Identifiers
Dichlorvos identifiers and molecular data
Dichlorvos CAS number and EC number
Dichlorvos molecular formula and molecular weight
Other names for Dichlorvos
- dichlorvos (ISO)
- 2,2-dichlorovinyl dimethyl phosphate
03 · GHS classification
Dichlorvos hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Dichlorvos pictograms and signal word
Dichlorvos hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - oral GHS chapter 3.1 | Category 3 | H301 | GHS06 |
| Acute toxicity - dermal GHS chapter 3.1 | Category 3 | H311 | GHS06 |
| Acute toxicity - inhalation GHS chapter 3.1 | Category 1 or 2 | H330 | GHS06 |
| Skin sensitisation GHS chapter 3.4 | Category 1 or 1A or 1B | H317 | GHS07 |
| Hazardous to the aquatic environment - acute GHS chapter 4.1 | Category 1 | H400 | GHS09 |
Where two values are shown with “or”, the hazard statement is shared by more than one category or by more than one class, and the code alone does not say which. H272, for example, belongs to oxidising liquids and to oxidising solids — the physical state decides. The binding answer for a specific entry is in the CLP Annex VI table itself.
Dichlorvos hazard statements (H-codes)
| 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. |
This page lists only the codes assigned to Dichlorvos. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.
Safety Data Sheet
Getting an SDS for Dichlorvos
A Safety Data Sheet is written for a product, not for a substance: the supplier of the grade you actually buy issues it, so two suppliers of Dichlorvos issue two different sheets. That is why there is no single authoritative SDS for a substance to download — what there is, is the job of collecting the sheets for the products you hold and keeping them current as suppliers revise them.
04 · Precautionary statements
Dichlorvos precautionary statements
CLP Annex VI assigns 17 precautionary statements to Dichlorvos. They are grouped the way a label groups them: what to do before handling, what to do when something has already happened, how to store it and how to dispose of it.
Prevention
What to do before and during handling so the hazard never happens.
Response
What to do once exposure, spillage or fire has already happened.
Disposal
What has to happen to the contents and the empty container.
Reading the notation. … is a blank the supplier fills in — not a truncated sentence.· [square brackets] mark a part printed only when it applies.
05 · Names in the regulation
Dichlorvos name in 23 EU languages
CLP Annex VI Part 3 is published in every language edition of the regulation, and the identification column is written out in each of them. Nothing below is translated by us: each line is the name as that edition prints it. Under Art. 18(2) the substance name from Annex VI is a lawful product identifier, so this is the wording to put on a label going to that market — and where the cell lists several designations, any one of them qualifies.
| Language | Name in CLP Annex VI Part 3 |
|---|---|
| Bulgarian български | дихлорвос (ISO) диметилов 2,2-дихлоровинилов фосфат |
| Spanish español | Diclorvós (ISO) fosfato de 2,2-diclorovinilo y dimetilo |
| Czech čeština | dichlorvos (ISO) 2,2-dichlorvinyl-dimethyl-fosfát |
| Danish dansk | dichlorvos (ISO) 2,2-dichlorvinyldimethylphosphat |
| German Deutsch | Dichlorvos (ISO) 2,2-DichlorvinyldimethylphosphatPhosphorsäure-2,2-dichlorvinyl-dimethylester |
| Estonian eesti | dikloorfoss (ISO) 2,2-diklorovinüüldimetüülfosfaat |
| Greek ελληνικά | dichlorvos (διχλωρβός) (ISO) διμεθυλοφωσφορικός 2,2-διχλωροβινυλεστέρας |
| English English | dichlorvos (ISO) 2,2-dichlorovinyl dimethyl phosphate |
| French français | dichlorvos (ISO) phosphate de 2,2-dichlorovinyle et de diméthyle |
| Croatian hrvatski | diklorvos (ISO) 2,2-diklorvinil-dimetil-fosfat |
| Italian italiano | diclorvos (ISO) fosfato di 2,2-diclorovinile e dimetile |
| Latvian latviešu | dihlorfoss (ISO) 2,2-dihlorvinildimetilfosfāts |
| Lithuanian lietuvių | dichlorvosas (ISO) 2,2-dichlorvinildimetilfosfatas |
| Hungarian magyar | diklórvosz (ISO) 2,2-diklórvinil-dimetil-foszfát |
| Maltese Malti | diklorvos (ISO) fosfat tad-dimetil ta’ 2,2-diklorovinil |
| Dutch Nederlands | dichloorvos (ISO) 2,2-dichloorvinyldimethylfosfaat |
| Polish polski | dichlorfos (ISO) fosforan 2,2-dichlorowinylu-dimetylu |
| Portuguese português | diclorvos (ISO) fosfato de 2,2-diclorovinilo e de dimetilo |
| Romanian română | diclorvos (ISO) fosfat de 2,2-diclorovinil și dimetil |
| Slovak slovenčina | dichlórvos (ISO) (2,2-dichlórvinyl)-dimetyl-fosfát |
| Slovenian slovenščina | diklorvos (ISO) 2,2-diklorovinil dimetil fosfat |
| Finnish suomi | diklorvossi (ISO) 2,2-dikloorivinyylidimetyylifosfaatti |
| Swedish svenska | diklorvos (ISO) 2,2-diklorvinyldimetylfosfat |
All 23 language editions of Annex VI carry this entry. Irish is the twenty-fourth official EU language and has no line here for a different reason: no consolidated CLP text has ever been published in Irish, so there is no Irish edition of Annex VI to quote a name from. Source: consolidated CLP, CELEX 02008R1272, language editions. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic.
06 · Label elements
Dichlorvos GHS label elements
Everything CLP Annex VI fixes for Dichlorvos, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Dichlorvos
- Fatal if inhaled.
- Toxic in contact with skin.
- Toxic if swallowed.
- May cause an allergic skin reaction.
- Very toxic to aquatic life.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Avoid breathing dust/fume/gas/mist/vapours/spray.
- Do not eat, drink or smoke when using this product.
- Use only outdoors or in a well-ventilated area.
- Contaminated work clothing should not be allowed out of the workplace.
- Avoid release to the environment.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF SWALLOWED:
- IF ON SKIN:
- IF INHALED:
- Immediately call a POISON CENTER/doctor/…
- Get medical advice/attention.
- Rinse mouth.
- If skin irritation or rash occurs:
- Wash with plenty of water/…
- Collect spillage.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Dichlorvos in the GHS label constructor →
07 · Health hazards
Dichlorvos health hazards and exposure limits
Dichlorvos hazard summary
Dichlorvos is an insecticide that is a dense colorless liquid. It has a sweetish smell and readily mixes with water. Dichlorvos used in pest control is diluted with other chemicals and used as a spray. It can also be incorporated into plastic that slowly releases the chemical. Dichlorvos is used for insect control in food storage areas, green houses, and barns, and control of insects on livestock. It is not generally used on outdoor crops. Dichlorvos is sometimes used for insect control in workplaces and in the home. Veterinarians use it to control parasites on pets.
Source: Agency for Toxic Substances and Disease Registry (ATSDR)
Dichlorvos carcinogenicity classification
Under the conditions of these 2-year gavage studies, there was some evidence of carcinogenic activity of dichlorvos for male F344/N rats, as shown by increased incidences of adenomas of the exocrine pancreas and mononuclear cell leukemia. There was equivocal evidence of carcinogenic activity of dichlorvos for female F344/N rats, as shown by increased incidences of adenomas of the exocrine pancreas and mammary gland fibroadenomas. There was some evidence of carcinogenic activity of dichlorvos for male B6C3F1 mice, as shown by increased incidences of forestomach squamous cell papillomas. There was clear evidence of carcinogenic activity of dichlorvos for female B6C3F1 mice, as shown by increased incidences of forestomach squamous cell papillomas.
Source: US National Toxicology Program · TR-342: Toxicology and Carcinogenesis Studies of Dichlorvos (CASRN 62-73-7) in F344/N Rats and B6C3F1 Mice (Gavage Studies) (1989 )
Cancer Classification: Suggestive Evidence of Carcinogenicity, but Not Sufficient to Assess Human Carcinogenic Potential
Source: Hazardous Substances Data Bank (HSDB)
Evaluation: There is inadequate evidence in humans for the carcinogenicity of dichlorvos. There is sufficient evidence in experimental animals for the carcinogenicity of dichlorvos. Overall evaluation: Dichlorvos is possibly carcinogenic to humans (2B).
Source: Hazardous Substances Data Bank (HSDB)
An IARC group and a CLP classification answer different questions. IARC judges whether the evidence for cancer in humans is strong enough; CLP Annex VI is the legally binding EU classification. A substance can carry one and not the other.
Dichlorvos occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | 1.0 [mg/m3] | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
| PEL | 1 mg/m³ | Occupational Safety and Health Administration (OSHA) |
| PEL | TWA 1 mg/m3 [skin] | The National Institute for Occupational Safety and Health (NIOSH) |
| REL | 1 mg/m³ | Occupational Safety and Health Administration (OSHA) |
| REL | TWA 1 mg/m3 [skin] | The National Institute for Occupational Safety and Health (NIOSH) |
| IDLH | 100 mg/m3 (NIOSH, 2024) | CAMEO Chemicals |
| IDLH | 100.0 [mg/m3] | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
| IDLH | 100 mg/cu m | Hazardous Substances Data Bank (HSDB) |
These are United States values. The European Union sets its own indicative and binding limits, and the figure that applies at a given workplace is the one in the local regulation — not the one shown here.
08 · 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.
Dichlorvos boiling point
| 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 |
Dichlorvos melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 83.89 °C (183 °F) | CAMEO | |
| -60 °C (-76 °F) | below this value | HSDB |
Dichlorvos density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.4 g/cm³ | ICSC | |
| 1.415 g/cm³ | at 25 °C | HSDB |
Dichlorvos solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| 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 |
Dichlorvos vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 0.01 mmHg | NIOSH | |
| 0.012 mmHg | at 20 °C | ICSC | |
| 0.0158 mmHg | at 25 °C | HSDB |
Dichlorvos flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | 100 °C (212 °F) | HSDB | |
| 176.67 °C (350 °F) | HSDB | ||
| 170 °C (338 °F) | ICSC |
Dichlorvos lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | Class III Combustible Liquid | NIOSH | |
| Moderately flammable, will not ignite easily. (EPA, 1998) | CAMEO |
Dichlorvos upper explosive limit (UEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Upper explosive limit (UEL) | Moderately flammable, will not ignite easily. (EPA, 1998) | CAMEO |
Dichlorvos vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 7.6 (air = 1) | ICSC |
Dichlorvos corrosivity
| Property | Value | Conditions | Source |
|---|---|---|---|
| Corrosivity | Corrosive to iron & mild steel | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Dichlorvos fire and explosion behaviour
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.
Dichlorvos fire potential
This chemical is a combustible liquid.
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
Dichlorvos storage and handling
Dichlorvos safe storage
Store only in original container. Well closed. Keep in a well-ventilated room. Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs. Store in an area without drain or sewer access.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
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)
Dichlorvos 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)
Dichlorvos 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 →
11 · Questions
Dichlorvos — frequently asked questions
What is the CAS number of Dichlorvos?
The CAS number of Dichlorvos is 62-73-7. Its EC number is 200-547-7.
What is the chemical formula of Dichlorvos?
The molecular formula of Dichlorvos is C4H7Cl2O4P and its molecular weight is 220.97 g/mol.
What does a Dichlorvos label have to show?
Under CLP Annex VI the label for Dichlorvos carries the pictograms Skull and crossbones and Environment and the signal word is Danger.
Is Dichlorvos flammable?
CLP Annex VI assigns Dichlorvos no flammability hazard class. That is not a statement that it cannot burn: the harmonised list only records the hazards that were assessed for it. The flash point reported for it is 100 °C (212 °F) (HSDB).
Is Dichlorvos a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Dichlorvos. Annex VI is a list of agreed classifications, not a list of substances found safe, so this is an absence of a classification rather than a clean bill of health. IARC places it in Group 2B: possibly carcinogenic to humans.
What is the exposure limit for Dichlorvos?
The US occupational exposure limit reported for Dichlorvos is 1.0 [mg/m3] (Haz-Map, Information on Hazardous Chemicals and Occupational Diseases). Limits differ by country: the EU sets its own indicative and binding values, and the figure that applies at a given workplace is the one in the local regulation.
What is the boiling point of Dichlorvos?
The boiling point reported for Dichlorvos is 234.1 °C (453.4 °F), at 750 mmHg (HSDB).
What is the melting point of Dichlorvos?
The melting point reported for Dichlorvos is 83.89 °C (183 °F) (CAMEO).
How should Dichlorvos be stored?
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. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Dichlorvos
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