| Agent Name |
Chlorpyrifos |
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| Alternative Name |
Dursban |
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| CAS Number |
2921-88-2 |
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| Formula |
C9-H11-Cl3-N-O3-P-S |
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| Major Category |
Pesticides |
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| Synonyms |
2-Pyridinol, 3,5,6-trichloro-, O-ester with O,O-diethyl; phosphorothioate; Bonidel; Brodan; Chlorpyrifos ethyl; Chlorpyrifos-ethyl; Chlorpyriphos; Chlorpyriphos [ISO-French]; Chlorpyriphos-ethyl; Coroban; Danusban; Detmol U.A.; Detmol ua; Dhanusban; Dowco 179; Durmet; Dursban; Dursban 10CR; Dursban 44; Dursban 4E; Dursban F; Dursban R; Equity; Ethyl chlorpyriphos; Geodinfos; Grofo; Killmaster; Lentrek; Lock-On; Lorsban; Lorsban 50SL; O,O-Diaethyl-O-3,5,6-trichlor-2-pyridylmonothiophosphat [German]; O,O-Diethyl O-(3,5,6-trichloro-2-pyridinyl)phosphorothioate; O,O-Diethyl O-(3,5,6-trichloro-2-pyridyl) phsophorothioate; O,O-Diethyl O-3,5,6-trichloro-2-pyridyl phosphorothioate; OMS-0971; Piridane; Pyrinex; Radar; Radar (fungicide); Spannit; Stipend; Suscon; Tafaban; Terial; Terial 40L; Trichlorpyrphos; XRM 429; XRM 5160; Zidil; suSCon Blue; suSCon Green; [ChemIDplus] |
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| Category |
Organophosphates |
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| Description |
Colorless to white, crystalline solid with a mild, mercaptan-like odor. [pesticide] [NIOSH] |
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| Sources/Uses |
Widely used in homes and on farms for cockroaches, fleas, termites, ticks, and crop pests; [ATSDR ToxFAQs] |
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| Comments |
The EPA reentry interval is 24 hours for emulsifiable concentrate or wettable powder if workers are not wearing protective clothing. Chlorpyrifos is classified as "moderately toxic." [EXTOXNET] A small number of the organophosphates (OPs) can Induce Delayed Neuropathy (OPIDN). OPIDN usually occurs after ingestion and is usually nonoccupational. [Levy, p. 572] |
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| Reference Link |
EXTOXNET PIP - CHLORPYRIFOS |
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| Exposure Assessment |
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| BEI |
Cholinesterase activity in red cells = 70% of individual's baseline, sample time discretionary; [ACGIH] |
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| Skin Designation (ACGIH) |
Yes |
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| TLV (ACGIH) |
0.1 mg/m3, inhalable fraction and vapor |
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| Vapor Pressure |
2 x 10 -05 mm Hg |
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| Reference Link |
ATSDR - ToxFAQs - Chlorpyrifos (Dursban) |
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| Adverse Effects |
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| Neurotoxin |
Motor Neuropathy |
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| Other Poison |
Organophosphate |
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| Links to Other NLM Databases |
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| Health Studies |
Human Health Effects from Hazardous Substances Data Bank: CHLORPYRIFOS
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