C19H16O4
308.3 g/mol
APIDanger
Warfarin
CAS81-81-2EC201-377-6
Category
API
Compound Class
Heterocycle
Primary Use
Pharmaceutical Raw Material
Warfarin is an anticoagulant active pharmaceutical ingredient used in rodent control and as a pharmaceutical raw material. It can cause developmental toxicity according to an independent committee of scientific and health experts.
Pharmaceutical manufacturing for anticoagulant formulationsRodent control in agricultural and residential settingsControl of common vampire bats
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.
Relevant lists:California Proposition 65
CAS 81-81-2
Related Compounds
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Safety Reference
Danger
H300Fatal if swallowed
H310Fatal in contact with skin
H330Fatal if inhaled
H372Causes damage to organs through prolonged or repeated exposure
H411Toxic to aquatic life with long lasting effects
H312Harmful in contact with skin
H319Causes serious eye irritation
H360May damage fertility or the unborn child
H412Harmful to aquatic life with long lasting effects
H370Causes damage to organs
H373May cause damage to organs through prolonged or repeated exposure
Customs Tariff Classification
The international HS code for Warfarin (CAS 81-81-2) is 2932.20.
HS code (international, 6-digit)
2932.20
EU CN code (8-digit)
2932 20 90
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
4-hydroxy-3-(3-oxo-1-phenylbutyl)chromen-2-one
InChIKey
PJVWKTKQMONHTI-UHFFFAOYSA-N
SMILES
CC(=O)CC(C1=CC=CC=C1)C2=C(C3=CC=CC=C3OC2=O)O
Synonyms (155)
- RAX
- Warfarin (INN)
- Warfarin, British Pharmacopoeia (BP)
- Warfarin, United States Pharmacopeia (USP)
- Warfarina [INN-Spanish]
- Warfarine [INN-French]
- Warfarinum [INN-Latin]
- (RS)-Warfarin
- 1,2 Benzopyrones
- 200 coumarin
- 4OH-Coumarin deriv.
- Aldocumar;
- Arab Rat Death
- Arab rat deth
- Athrombine-K
- Benzopyran 2 ones
- Brumolin
- CO-Rax
- Choice
- Choice (TN)
- Compound 42
- Coumadin
- Coumafen
- Coumafene
- Coumafene [French]
- Coumaphen
- Coumaphene
- Coumarin Derivative
- Coumarines
- Coumarins
- Coumefene
- Cov-R-Tox
- D-Con
- Derivative, Coumarin
- Dethmor
- Dethnel
- Dicusat E
- Eastern states duocide
- Fasco fascrat powder
- Frass-Ratron
- Killgerm sewarin p
- Kumader
- Kumadu
- Kumatox
- Kypfarin
- Latka 42
- Latka 42 [Czech]
- Liqua-tox
- Maag Rattentod Cum
- Mar-Frin
- Marevan;
- Martin's mar-frin
- Maveran
- Mouse pak
- Panwarfin;
- Place-pax
- Potassium, Warfarin
- Rat & mice bait
- Rat and mice bait
- Rat-B-gon
- Rat-Gard
- Rat-Kill
- Rat-Mix
- Rat-Ola
- Rat-Trol
- Rat-a-way
- Rat-alpha-way
- Rat-beta-gon
- Rat-o-cide #2
- Rat-o-cide No. 2
- Ratorex
- Ratox
- Ratoxin
- Ratron
- Ratron G
- Rats-no-more
- Ratten-Koederrohr
- Ratten-Koederrohr (German)
- Rattenstreupulver Neu Schacht
- Rattenstreupulver new schacht
- Rattentraenke
- Rattentraenke (German)
- Rattunal
- Ro-Deth
- Rodafarin
- Rodafarin C
- Rodex
- Rodex blox
- Rosex
- Rough & ready mouse mix
- Rough and ready mouse mix
- Sakarat
- Sewarin
- Sodium, Warfarin
- Solfarin
- Sorexa plus
- Spray-trol brand roden-trol
- Temus W
- Tox-hid
- Twin light rat away
- Vampirinip II
- Vampirinip iii
- Vampirinip;
- WARF compound 42
- WARF-42;Athrombine-K
- Waran;
- Warf
- Warf 42
- Warfarat
- Warfarin Q
- Warfarin RS
- Warfarin plus
- Warfarin plus [discontinued]
- Warfarin, PESTANAL(R)
- Warfarina
- Warfarine
- Warfarine [ISO-French]
- Warfarinum
- Warficide
- Zoocoumarin
- Zoocoumarin [Russian]
- delta-con
- rac-Warfarin
- wafarin
- warfarin