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Chlorpyrifos

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Synonyms & Trade Names
Chlorpyrifos-ethyl, O,O-Diethyl O-3,5,6-trichloro-2-pyridyl phosphorothioate, Dursban®
CAS No.
2921-88-2
RTECS No.
TF6300000
DOT ID & Guide
2783 152
Formula
C₉H₁₁Cl₃NO₃PS
Conversion
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
TWA 0.2 mg/m3 ST 0.6 mg/m3 [skin]
OSHA PEL
none See Appendix G
Measurement Methods
NIOSH 5600;
OSHA 62
See: NMAM or OSHA Methods
Physical Description
Colorless to white, crystalline solid with a mild, mercaptan-like odor. [pesticide] [Note: Commercial formulations may be combined with combustible liquids.]
Molecular Weight
350.6
Boiling Point
320°F (Decomposes)
Melting Point
108°F
Solubility
0.0002%
Vapor Pressure
0.00002 mmHg
Ionization Potential
?
Specific Gravity
1.40 (Liquid at 110°F)
Flash Point
?
Upper Explosive Limit
?
Lower Explosive Limit
?
Combustible Solid
Incompatibilities & Reactivities
Strong acids, caustics, amines [Note: Corrosive to copper & brass.]
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
wheezing, laryngeal spasms, salivation; bluish lips, skin; miosis, blurred vision; nausea, vomiting, abdominal cramps, diarrhea
Target Organs
respiratory system, central nervous system, peripheral nervous system, plasma 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:Daily
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Soap wash immediately
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

Not available.

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 0851
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health