C9H11Cl3NO3PS
350.6 g/mol
AgrochemicalDanger
Chlorpyrifos
CAS2921-88-2EC220-864-4
Category
Agrochemical
Compound Class
Heterocycle
Primary Use
organophosphate insecticide
Chlorpyrifos is an organophosphate pesticide used to control various pests including insects and worms on crops, animals, and in buildings. It works by inhibiting the acetylcholinesterase enzyme in the nervous system of insects.
Crop pest controlAnimal pest controlStructural pest control
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
Restricted or banned substances
Substances on this list are banned or restricted under the named regulation. This page is a compliance reference — verify your obligations under applicable law.
CAS 2921-88-2
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Related Reading
Safety Reference
Danger
H301Toxic if swallowed
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects
H312Harmful in contact with skin
H319Causes serious eye irritation
H330Fatal if inhaled
H320Causes eye irritation
H370Causes damage to organs
H372Causes damage to organs through prolonged or repeated exposure
H373May cause damage to organs through prolonged or repeated exposure
H311Toxic in contact with skin
Customs Tariff Classification
The international HS code for Chlorpyrifos (CAS 2921-88-2) is 2933.39.
HS code (international, 6-digit)
2933.39
EU CN code (8-digit)
2933 39 99
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
diethoxy-sulfanylidene-[(3,5,6-trichloro-2-pyridinyl)oxy]-lambda5-phosphane
InChIKey
SBPBAQFWLVIOKP-UHFFFAOYSA-N
SMILES
CCOP(=S)(OCC)OC1=NC(=C(C=C1Cl)Cl)Cl
Synonyms (97)
- Bolton
- Bonidel
- Bonidel; CPF Zamba; Chlora;
- Brodan
- CHLORPYRIFOS [MART.]
- Caswell No. 219AA
- Chloropyrifos
- Chloropyriphos
- Chlorpyrifos (BAN)
- Chlorpyrifos (Dursban)
- Chlorpyrifos (Standard)
- Chlorpyrifos, PESTANAL(R)
- Chlorpyrifos-ethyl
- Chlorpyriphos
- Chlorpyriphos [ISO-French]
- Chlorpyriphos-ethyl
- Chlorpyrofos
- Chlorpyrophos
- Coroban
- Danusban
- Detmol
- Detmol U.A.
- Dhanusban
- Dowco 179
- Durmet
- Dursban
- Dursban 10CR
- Dursban 2E
- Dursban 44
- Dursban 4E
- Dursban F
- Dursban R
- ENT 27,311
- Empire
- Empire 20
- Equity
- Eradex
- Ethion, dry
- Ethyl chlorpyriphos
- Geodinfos
- Grofo
- Killmaster
- Lentrek
- Lock-On
- Lorsban
- Lorsban 50SL
- Nufos
- Pageant
- Piridane
- Pyrinex
- Radar
- Radar (fungicide)
- Silrifos
- Spannit
- Stipend
- Suscon blue
- Suscon green
- Tafaban
- Terial
- Terial 40L
- Tricel
- Trichlorpyrphos
- Warhawk
- Zidil
- Zodiac (TN)
- chlorpyrifos
- m-Chlorpyrifos
- pridane
- suSCon