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Chemical Datasheet
DICHLORVOS |
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Chemical Identifiers
CAS Number |
UN/NA Number |
DOT Hazard Label |
USCG CHRIS Code |
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- 2783
(solid)
- 3018
(liquid)
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NIOSH Pocket Guide |
International Chem Safety Card |
Dichlorvos
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NFPA 704
General Description
A colorless to amber liquid with an aromatic odor. When heated to high temperatures may emit toxic chloride fumes and phosgene gas. Toxic by inhalation, skin absorption or ingestion. Used as a pesticide. May be found in the form of a dry mixture where the liquid is absorbed onto a dry carrier.
Hazards
Reactivity Alerts
none
Air & Water Reactions
More dense than water and slightly soluble in water.
Fire Hazard
Toxic chloride fumes and phosgene formed if heated to decomposition or on contact with acid or acid fumes. Corrosive to iron and mild steel, acids or acid fumes. Hydrolyzes in water. (EPA, 1998)
Health Hazard
Dichlorvos is a very toxic compound with a probable lethal oral dose in humans between 50 and 500 mg/kg, or between 1 teaspoonful and 1 oz. for a 70 kg (150 lb.) person. However, brief exposure (30-60 minutes) to vapor concentrations as high as 6.9 mg/liter did not result in clinical signs or depressed serum cholinesterase levels. Toxic changes are typical of organophosphate insecticide poisoning with progression to respiratory distress, respiratory paralysis, and death if there is no clinical intervention. (EPA, 1998)
Reactivity Profile
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.
Belongs to the Following Reactive Group(s)
- Esters, Sulfate Esters, Phosphate Esters, Thiophosphate Esters, and Borate Esters
- Halogenated Organic Compounds
- Hydrocarbons, Aliphatic Unsaturated
Potentially Incompatible Absorbents
Use caution: Liquids with this reactive group classification have been
known to react with the
absorbent
listed below.
Response Recommendations
Isolation and Evacuation
Excerpt from 152
[Substances - Toxic (Combustible)]:
IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids.
SPILL: Increase the immediate precautionary measure distance, in the downwind direction, as necessary.
FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2020)
Firefighting
Use self-contained breathing apparatus with a full face piece operated on pressure-demand or other positive pressure mode. Prevent skin contact with protective clothing. Isolate area and deny entry. Fight fire from maximum distance. Dike fire control water for future disposal.
Use water in flooding quantities as fog, alcohol foam, dry chemical, or carbon dioxide. Do not scatter the material. (EPA, 1998)
Non-Fire Response
Excerpt from 152
[Substances - Toxic (Combustible)]:
ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. Cover with plastic sheet to prevent spreading. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS. (ERG, 2020)
Protective Clothing
Excerpt from NIOSH Pocket Guide for Dichlorvos:
Skin: PREVENT SKIN CONTACT - Wear appropriate personal protective clothing to prevent skin contact.
Eyes: PREVENT EYE CONTACT - Wear appropriate eye protection to prevent eye contact.
Wash skin: WHEN CONTAMINATED - The worker should immediately wash the skin when it becomes contaminated.
Remove: WHEN WET OR CONTAMINATED - Work clothing that becomes wet or significantly contaminated should be removed and replaced.
Change: No recommendation is made specifying the need for the worker to change clothing after the workshift. (NIOSH, 2023)
DuPont Tychem® Suit Fabrics
No information available.
First Aid
Warning: Effects may be delayed up to 12 hours. Caution is advised.
Note: Dichlorvos is a cholinesterase inhibitor.
Signs and Symptoms of Acute Dichlorvos Exposure: Acute exposure to dichlorvos may produce the following signs and symptoms: sweating, pinpoint pupils, blurred vision, headache, dizziness, profound weakness, muscle spasms, seizures, and coma. Mental confusion and psychosis may occur. Excessive salivation, nausea, vomiting, anorexia, diarrhea, and abdominal pain may also occur. The heart rate may decrease following oral exposure or increase following dermal exposure. Chest pain may be noted. Hypotension (low blood pressure) may be observed, although hypertension (high blood pressure) is not uncommon. Respiratory symptoms include dyspnea (shortness of breath), pulmonary edema, respiratory depression, and respiratory paralysis.
Emergency Life-Support Procedures: Acute exposure to dichlorvos may require decontamination and life support for the victims. Emergency personnel should wear protective clothing appropriate to the type and degree of contamination. Air-purifying or supplied-air respiratory equipment should also be worn, as necessary. Rescue vehicles should carry supplies such as plastic sheeting and disposable plastic bags to assist in preventing spread of contamination.
Inhalation Exposure:
1. Move victims to fresh air. Emergency personnel should avoid self-exposure to dichlorvos.
2. Evaluate vital signs including pulse and respiratory rate, and note any trauma. If no pulse is detected, provide CPR. If not breathing, provide artificial respiration. If breathing is labored, administer 100% humidified oxygen or other respiratory support.
3. Obtain authorization and/or further instructions from the local hospital for administration of an antidote or performance of other invasive procedures.
4. Transport to a health care facility.
Dermal/Eye Exposure:
1. Remove victims from exposure. Emergency personnel should avoid self-exposure to dichlorvos.
2. Evaluate vital signs including pulse and respiratory rate, and note any trauma. If no pulse is detected, provide CPR. If not breathing, provide artificial respiration. If breathing is labored, administer 100% humidified oxygen or other respiratory support.
3. Remove contaminated clothing as soon as possible.
4. If eye exposure has occurred, eyes must be flushed with lukewarm water for at least 15 minutes.
5. Wash exposed skin areas three times with soap and water.
6. Obtain authorization and/or further instructions from the local hospital for administration of an antidote or performance of other invasive procedures.
7. Transport to a health care facility.
Ingestion Exposure:
1. Evaluate vital signs including pulse and respiratory rate, and note any trauma. If no pulse is detected, provide CPR. If not breathing, provide artificial respiration. If breathing is labored, administer 100% humidified oxygen or other respiratory support.
2. Obtain authorization and/or further instructions from the local hospital for administration of an antidote or performance of other invasive procedures.
3. Vomiting may be induced with syrup of Ipecac. If elapsed time since ingestion of dichlorvos is unknown or suspected to be greater than 30 minutes, do not induce vomiting and proceed to Step
4. Ipecac should not be administered to children under 6 months of age.Warning: Ingestion of dichlorvos may result in sudden onset of seizures or loss of consciousness. Syrup of Ipecac should be administered only if victims are alert, have an active gag-reflex, and show no signs of impending seizure or coma. If ANY uncertainty exists, proceed to Step
4.The following dosages of Ipecac are recommended: children up to 1 year old, 10 mL (1/3 oz); children 1 to 12 years old, 15 mL (1/2 oz); adults, 30 mL (1 oz). Ambulate (walk) the victims and give large quantities of water. If vomiting has not occurred after 15 minutes, Ipecac may be readministered. Continue to ambulate and give water to the victims. If vomiting has not occurred within 15 minutes after second administration of Ipecac, administer activated charcoal.
4. Activated charcoal may be administered if victims are conscious and alert. Use 15 to 30 g (1/2 to 1 oz) for children, 50 to 100 g (1-3/4 to 3-1/2 oz) for adults, with 125 to 250 mL (1/2 to 1 cup) of water.
5. Promote excretion by administering a saline cathartic or sorbitol to conscious and alert victims. Children require 15 to 30 g (1/2 to 1 oz) of cathartic; 50 to 100 g (1-3/4 to 3- 1/2 oz) is recommended for adults.
6. Transport to a health care facility. (EPA, 1998)
Physical Properties
Flash Point:
Greater than 175F
(EPA, 1998)
Lower Explosive Limit (LEL):
Moderately flammable, will not ignite easily.
(EPA, 1998)
Upper Explosive Limit (UEL):
Moderately flammable, will not ignite easily.
(EPA, 1998)
Autoignition Temperature: data unavailable
Melting Point:
183°F
(NTP, 1992)
Vapor Pressure:
0.01 mmHg
at 86°F
(EPA, 1998)
Vapor Density (Relative to Air): data unavailable
Specific Gravity:
1.415
at 77°F
(EPA, 1998)
- Denser than water; will sink
Boiling Point:
284°F
at 20 mmHg
(EPA, 1998)
Molecular Weight:
220.98
(EPA, 1998)
Water Solubility:
10 to 50 mg/mL
at 68°F
(NTP, 1992)
Ionization Energy/Potential: data unavailable
IDLH:
100 mg/m3
(NIOSH, 2023)
AEGLs (Acute Exposure Guideline Levels)
No AEGL information available.
ERPGs (Emergency Response Planning Guidelines)
No ERPG information available.
PACs (Protective Action Criteria)
Chemical |
PAC-1 |
PAC-2 |
PAC-3 |
Dichlorovos; (Dichlorvos) (62-73-7)
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1.8 mg/m3 |
20 mg/m3 |
200 mg/m3 |
(DOE, 2018)
Regulatory Information
EPA Consolidated List of Lists
Regulatory Name |
CAS Number/ 313 Category Code |
EPCRA 302 EHS TPQ |
EPCRA 304 EHS RQ |
CERCLA RQ |
EPCRA 313 TRI |
RCRA Code |
CAA 112(r) RMP TQ |
Dichlorvos |
62-73-7 |
1000 pounds |
10 pounds |
10 pounds |
313 |
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Phosphoric acid, 2-dichloroethenyl dimethyl ester |
62-73-7 |
1000 pounds |
10 pounds |
10 pounds |
X |
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(EPA List of Lists, 2022)
CISA Chemical Facility Anti-Terrorism Standards (CFATS)
No regulatory information available.
OSHA Process Safety Management (PSM) Standard List
No regulatory information available.
Alternate Chemical Names
- APAVAP
- ASTROBOT
- ATGARD
- ATGARD C
- ATGARD V
- BAY-19149
- BAYER 19149
- BENFOS
- BIBESOL
- BREVINYL
- BREVINYL E 50
- BREVINYL E50
- BREVINYL WEEDAT 0002
- CANOGARD
- CEKUSAN
- CELCUSAN
- CHLORVINPHOS
- CYANOPHOS
- CYPONA
- DDVF
- DDVP
- DDVP (INSECTICIDE)
- DEDEVAP
- DERIBAN
- DERRIBANTE
- DES
- DEVIKOL
- DICHLOFOS
- DICHLORMAN
- 2,2-DICHLOROETHENOL DIMETHYL PHOSPHATE
- 2,2-DICHLOROETHENYL DIMETHYL PHOSPHATE
- 2,2-DICHLOROETHENYL PHOSPHATE
- 2,2-DICHLOROETHENYL PHOSPHORIC ACID DIMETHYL ESTER
- DICHLOROPHOS
- DICHLOROVAS
- DICHLOROVINPHOS
- 2,2-DICHLOROVINYL ALCOHOL DIMETHYL PHOSPHATE
- 2,2-DICHLOROVINYL DIMETHYL PHOSPHATE
- 2,2-DICHLOROVINYL DIMETHYL PHOSPHORIC ACID ESTER
- 2,2-DICHLOROVINYL
- DICHLOROVOS
- DICHLORPHOS
- DICHLORVOS
- DIMETHYL 2,2-DICHLOROETHENYL PHOSPHATE
- DIMETHYL 2,2-DICHLOROVINYL PHOSPHATE
- DIMETHYL DICHLOROVINYL PHOSPHATE
- DIVIPAN
- DUO-KILL
- DURAVOS
- ENT 20738
- EQUIGARD
- EQUIGEL
- ESTROSEL
- ESTROSOL
- ETHENOL, 2,2-DICHLORO-, DIMETHYL PHOSPHATE
- FECAMA
- FEKAMA
- FLY FIGHTER
- FLY-DIE
- HERKAL
- HERKOL
- INSECTIGAS D
- KRECALVIN
- LINDAN
- MAFU
- MAFU STRIP
- MARVEX
- MOPARI
- NCI-C00113
- NEFRAFOS
- NERKOL
- NO-PEST
- NO-PEST STRIP
- NOGOS
- NOGOS 50
- NOGOS 50 EC
- NOGOS 500
- NOGOS G
- NOVOTOX
- NSC-6738
- NUVA
- NUVAN
- NUVAN 100 EC
- NUVAN 100EC
- NUVAN 500 EC
- NUVAN 7
- O,O-DIMETHYL 2,2-DICHLOROVINYL PHOSPHATE
- O,O-DIMETHYL DICHLOROVINYL PHOSPHATE
- O,O-DIMETHYL O-2,2-DICHLOROVINYL PHOSPHATE
- O,O-DIMETHYL PHOSPHATE
- OKO
- OMS 14
- PANAPLATE
- PHOSPHORIC ACID, 2,2-DICHLOROETHENYL DIMETHYL ESTER
- PHOSPHORIC ACID, 2,2-DICHLOROVINYL DIMETHYL ESTER
- PHOSPHORIC ACID, 2-DICHLOROETHENYL DIMETHYL ESTER
- PHOSVIT
- PHOSVIT 75
- PRIMA U
- SD 1750
- SD-1750
- SD1750
- SZKLARNIAK
- TAP 9VP
- TASK
- TASK TABS
- TENAC
- TETRAVOS
- UDVF
- UNIFOS
- UNIFOS (PESTICIDE)
- UNIFOS 50 EC
- UNIFOS 50EC
- UNITOX
- VAPONA
- VAPONA II
- VAPONA INSECTICIDE
- VAPONITE
- VAPORA II
- VERDICAN
- VERDIPOR
- VINYL ALCOHOL
- VINYL ALCOHOL, 2,2-DICHLORO-, DIMETHYL PHOSPHATE
- VINYLOFOS
- VINYLOPHOS
- WINYLOPHOS