Dichlorvos

Synonyms & Trade Names

DDVP, 2,2-Dichlorovinyl dimethyl phosphate

CAS No.

62-73-7

RTECS No.

TC0350000

DOT ID & Guide

2783 152

Formula

(CH₃O)₂P(O)OCH=CCl₂

Conversion

1 ppm = 9.04 mg/m³

IDLH

100 mg/m³
See: 62737

Exposure Limits

NIOSH REL

TWA 1 mg/m³ [skin]

OSHA PEL

TWA 1 mg/m³ [skin]

Measurement Methods

NIOSH P&CAM295 (II-5);
OSHA 62
See: NMAM or OSHA Methods

Physical Description

Colorless to amber liquid with a mild, chemical odor. [Note: Insecticide that may be absorbed on a dry carrier.]

Molecular Weight

221.0

Boiling Point

Decomposes

Freezing Point

Solubility

0.5%

Vapor Pressure

0.01 mmHg

Ionization Potential

Specific Gravity

(77°F): 1.42

Flash Point

>175°F

Upper Explosive Limit

Lower Explosive Limit

Class III Combustible Liquid

Incompatibilities & Reactivities

Strong acids, strong alkalis [Note: Corrosive to iron & mild steel.]

Exposure Routes

inhalation, skin absorption, ingestion, skin and/or eye contact

Symptoms

irritation eyes, skin; miosis, ache eyes; rhinorrhea (discharge of thin nasal mucus); headache; chest tightness, wheezing, laryngeal spasm, salivation; cyanosis; anorexia, nausea, vomiting, diarrhea; sweating; muscle fasciculation, paralysis, dizziness, ataxia; convulsions; low blood pressure, cardiac irreg

Target Organs

Eyes, skin, respiratory system, cardiovascular system, central nervous system, blood cholinesterase

Personal Protection/Sanitation

(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet or contaminated
Change:No recommendation

First Aid

(See procedures)
Eye:Irrigate immediately
Skin:Soap wash immediately
Breathing:Respiratory support
Swallow:Medical attention immediately

Respirator Recommendations

NIOSH/OSHA

Up to 10 mg/m³:
(APF = 10) Any supplied-air respirator

Up to 25 mg/m³:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode

Up to 50 mg/m³:
(APF = 50) Any supplied-air respirator that has a tight-fitting facepiece and is operated in a continuous-flow mode
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece

Up to 100 mg/m³:
(APF = 1000) Any supplied-air respirator operated in a pressure-demand or other positive-pressure mode

Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus

Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister having an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

Dichlorvos

NIOSH REL

OSHA PEL

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