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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.]
MW:
221.0
BP:
Decomposes
FRZ:
?
Sol:
0.5%
VP:
0.01 mmHg
IP:
?
Sp.Gr(77°F): 1.42
Fl.P:
>175°F
UEL:
?
LEL:
?
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

See also: INTRODUCTION   See ICSC CARD: 0690   See MEDICAL TESTS: 0076
 

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