Chemical Database



  • Formula: C19H16O4
    Elements: Carbon, Hydrogen, Oxygen
  • CAS Number: 81-81-2
  • Caswell Number: 291
  • Caswell Number: 903
  • CCOHS Record Number: 665
  • RCRA Waste Number: P001
  • RTECS Number: GN4550000
  • Synonyms/Related:
    • (-)-Warfarin
    • (Phenyl-1 acetyl-2 ethyl) 3-hydroxy-4 coumarine
    • (Phenyl-1 acetyl-2 ethyl) 3-Hydroxy-4 coumarine (French)
    • (Phenyl-1 acetyl-2 ethyl) 3-hydroxy-4 coumarine [French]
    • (S)-4-Hydroxy-3-(3-oxo-1-phenylbutyl)-2-benzopyrone
    • (S)-Warfarin
    • 1-(4'-Hydroxy-3'-coumarinyl)-1-phenyl-3-butanone
    • 1-(4'-hydroxy-3'coumarinyl)-1-phenyl-3-butanone
    • 200 coumarin
    • 2H-1-Benzopyran-2-one, 4-hydroxy-3- (3-oxo-1-phenylbutyl)-
    • 2H-1-Benzopyran-2-one, 4-hydroxy-3-(3-oxo-1-phenylbutyl)-
    • 2H-1-Benzopyran-2-one, 4-hydroxy-3-(3-oxo-1-phenylbutyl)-, & salts, when present at concentrations greater than 0.3%
    • 2H-1-Benzopyran-2-one, 4-hydroxy-3-(3-oxo-1-phenylbutyl)-, (S)-
    • 2H-1-Benzopyran-2-one, 4-hydroxy-3-(3-oxo-1-phenylbutyl)-, potassium salt
    • 3-(.alpha.-Acetonylbenzyl)-4-hydroxycoumarin
    • 3-(.alpha.-Phenyl-.beta.-acetylethyl)-4-hydroxycoumarin
    • 3-(1'-Phenyl-2'-acetylethyl)-4-hydroxycoumarin
    • 3-(Acetonylbenzyl)-4-hydroxycoumarin
    • 3-(alpha-Acetonyl)-benzyl-4-hydroxycoumarin
    • 3-(alpha-Acetonylbenzene)-4-hydroxycoumarin
    • 3-(alpha-Acetonylbenzyl)-4-hydroxycoumarin
    • 3-(alpha-Acetonylbenzyl)-4-hydroxycoumarin potassium salt
    • 3-(alpha-Phenyl-beta-acetylaethyl)-4-hydroxycumarin
    • 3-(alpha-Phenyl-beta-acetylaethyl)-4-hydroxycumarin [German]
    • 3-(alpha-Phenyl-beta-acetylethyl)-4-hydroxycoumarin
    • 4-Hydroxy-3- (3-oxo-1-fenyl-butyl) cumarine
    • 4-Hydroxy-3- (3-oxo-1-phenyl-butyl)-cumarin
    • 4-Hydroxy-3-(3-oxo-1-fenyl-butyl) cumarine
    • 4-Hydroxy-3-(3-oxo-1-fenyl-butyl) cumarine (DUTCH)
    • 4-Hydroxy-3-(3-oxo-1-fenyl-butyl) cumarine [Dutch]
    • 4-Hydroxy-3-(3-oxo-1-phenyl butyl)-2H-1-benzopyran-2-one
    • 4-Hydroxy-3-(3-oxo-1-phenyl-butyl)-cumarin
    • 4-Hydroxy-3-(3-oxo-1-phenyl-butyl)-cumarin (GERMAN)
    • 4-Hydroxy-3-(3-oxo-1-phenyl-butyl)-cumarin [German]
    • 4-Hydroxy-3-(3-oxo-1-phenylbutyl)-2H-1-benzopyran-2-one
    • 4-Hydroxy-3-(3-oxo-1-phenylbutyl) coumarin
    • 4-Idrossi-3- (3-oxo-)-fenil-butil)-cumarine
    • 4-Idrossi-3-(3-oxo-)-fenil-butil)-cumarine (ITALIAN)
    • 4-Idrossi-3-(3-oxo-1-fenil-butil)-cumarine
    • 4-Idrossi-3-(3-oxo-1-fenil-butil)-cumarine [Italian]
    • 4OH-Coumarin deriv.;Coumadin
    • Antiresistant
    • Antrombin K
    • AR 10
    • Arab Rat Death
    • Arab Rat Deth
    • Athrombin-K
    • Athrombin-K (TN)
    • Athrombin-K /Potassium salt/
    • Athrombine-K
    • Benzenesulfonamide, N,N-dibutyl-4-chloro-
    • Benzenesulfonamide, p-chloro-N,N-dibutyl-
    • Brumolin
    • C01541
    • CBDivE_002127
    • CBDivE_013236
    • CBMicro_006700
    • CO-Rax
    • Compound 42
    • Coumadin
    • Coumadin /Sodium salt/
    • Coumafen
    • Coumafene
    • Coumafene (FRENCH)
    • Coumafene [French]
    • Coumaphene
    • Coumarin, 3- (.alpha.-acetonylbenzyl)-4-hydroxy-
    • Coumarin, 3-(alpha-acetonylbenzyl)-4-hydroxy-
    • Coumarin, 4-hydroxy-3-(1-phenyl-3-oxobutyl)
    • Coumarins
    • Coumefene
    • Cov-R-Tox
    • d-Con
    • D01280
    • DDT warf antiresistant
    • Dethmor
    • Dethnel
    • Dicusat E
    • DL-3-(alpha-Acetonylbenzyl)-4-hydroxycoumarin
    • Eastern states duocide
    • Fasco fascrat powder
    • Frass-ratron
    • Kumader
    • Kumadu
    • Kumatox
    • Kypfarin
    • Latka 42
    • Latka 42 [Czech]
    • Liqua-tox
    • Maag rattentod cum
    • Mar-frin
    • Marevan /Sodium salt/
    • Martin's Mar-Frin
    • Maveran
    • Maveran /Sodium salt/
    • Mouse pak
    • N,N-Di-n-butyl-p-chlorobenzenesulfonamide
    • N,N-Dibutyl-p-chlorobenzenesulfonamide
    • NINDS_000444
    • Place-pax
    • Potassium warfarin
    • Pramax
    • Prothromadin /Sodium salt/
    • rac-Warfarin
    • Rat & mice bait
    • Rat and mice bait
    • RAT-A-WAY
    • Rat-B-gon
    • RAT-GARD
    • Rat-Kill
    • RAT-MIX
    • Rat-o-cide #2
    • Rat-ola
    • Rat-trol
    • Ratorex
    • Ratox
    • Ratoxin
    • Ratron
    • Ratron G
    • Rats-no-more
    • Ratten-koederrohr
    • Rattenstreupulver Neu Schacht
    • Rattenstreupulver new schacht
    • Rattentraenke
    • Rattunal
    • Rax
    • Ro-Deth
    • Rodafarin
    • Rodafarin C
    • Rodex
    • Rodex blox
    • Rosex
    • Rough & Ready Mouse Mix
    • Rough and ready mouse mix
    • Solfarin
    • Spray-trol brand roden-trol
    • Temus W
    • Tintorane /Sodium salt/
    • Tox-Hid
    • Twin light rat away
    • Vampirinip II
    • Vampirinip III
    • W.A.R.F. 42
    • Waran /Sodium salt/
    • Warf
    • Warf 42
    • Warf antiresistant
    • Warf compound 42
    • Warf DDT anti-resistant
    • Warf-12
    • Warfarat
    • Warfarin
    • Warfarin (and salts of)
    • Warfarin and salts, when present at concentration greater than 0.3%
    • Warfarin K
    • Warfarin plus
    • Warfarin plus /discontinued/
    • Warfarin plus [discontinued]
    • Warfarin potassium
    • Warfarin potassium (JP14)
    • Warfarin potassium [JAN]
    • Warfarin Q
    • Warfarin [BSI:ISO]
    • Warfarina [INN-Spanish]
    • Warfarine
    • Warfarine (French)
    • Warfarine [INN-French]
    • Warfarine [ISO-French]
    • Warfarinum [INN-Latin]
    • Warfilone /Sodium salt/
    • Zoocoumarin
    • Zoocoumarin (NETHERLANDS AND USSR)
    • Zoocoumarin [Netherlands and USSR]
    • Zoocoumarin [Russian]


  • Boiling Point: K °C °F
  • Flammability:
    • Explosive Limits:
      • Lower Explosive Limit: 0%
      • Upper Explosive Limit: 0%
    • Flammable Limits:
      • Lower Flammable Limit: 0%
      • Upper Flammable Limit: 0%
    • Flash Point K °C °F
    • Autoignition Temperature: K °C °F
  • Incompatiblities:
    • strong oxidizers
  • Melting Point: K °C °F

Health & Regulatory Guidelines

  • EPA Regulations:
    • Reportable Quantity: 100 Lbs
    • Marine Polutant: Yes
  • NIOSH Guidelines:
  • OSHA Regulations:

Related Resources

  • USDOT Hazardous Materials Table 49 CFR 172.101
    An online version of the USDOT's listing of hazardous materials from 49CFR 172.101. This table can be sorted by proper shipping name, UN/NA ID and/or by primary hazard class/division.
  • 2008 ERG (Emergency Response Guidebook)
    Have you ever wondered what those four digit numbers on the placards on the side of trucks and rail cars mean? Our online 2008 ERG will give you your answer. This is an online version of the guidebook produced by the USDOT for first responders during the initial phase of a Dangerous goods/HazMat incident. ERG data last verified/updated Oct. 2, 2011
  • US DOT Hazardous Materials Transportation Placards
    Hazardous materials placards (DOT placards) are required when shipping hazardous materials in the United States, Canada and Mexico. These pages provide US DOT definitions for each hazmat placard.
  • Guide for Handling Household Chemicals
    Things you can do to make your home safer.
  • Molarity, Molality and Normality
    Introduces stoichiometry and explains the differences between molarity, molality and normality.
  • Molar Mass Calculations and Javascript Calculator
    Molar mass calculations are explained and there is a JavaScript calculator to aid calculations.
  • Periodic Table of Elements
    Provides comprehensive data for each element of the periodic table of elements including up to 40 properties, names in 10 languages and common chemical compounds. Information also provided for 3,600 nuclides and 4,400 nuclide decay modes.

Editor's note: Some chemicals in this database contain more information than others due to the original reason this information was collected and how the compilation was accomplished.

While working with material safety data sheets (MSDS), I found that manufacturers sometimes used obscure names for constituent chemicals and I didn't always have a good idea of what I was dealing with. To resolve this problem, over the years, I compiled chemical names and identifiers into a personal database, cross referencing regulatory and health safety information when possible. Colleagues and friends eventually started suggesting that I make my data available on this website so that others could benefit from my efforts -- which I finally did in 2004. The more common, regulated and/or hazardous a chemical is, the more information I will have likely collected it.


If you are aware of any synonyms listed above that are registered trademarks, please contact us with relevant information so that trademarks can be appropriately noted.

Notes about mixtures

Some chemicals listed in this database or not pure chemical compounds, rather they are mixtures/solutions of chemicals. It is not uncommon for wide range of molar ratios of a mixture to be lumped together as "synonyms" of the same "chemical". In some instances chemicals that are very similar from a health & safety and/or regulatory standpoint also may have been lumped together.

Reference Sources

Data for this database was compiled from: hundreds of Material Safety Data Sheets (MSDS) of common industrial and household products; the Hazardous Materials Table from the United States "Code of Federal Regulations" title 49 section 172.101; the National Institute for Occupational Safety and Health Pocket Guide to Chemical Hazards; the US DOT 1996, 2000 & 2004 Emergency Response Guidebooks; U.S. National Library of Medicine and many other related resources.


WARNING: These pages are for general reference and educational purposes only and MUST NOT be relied upon as a sole source to determine regulatory compliance or where matters of life and health are concerned. This site and the author do not warrant or guarantee the accuracy or the sufficiency of the information provided and do not assume any responsibility for its use.

To ensure regulatory compliance when transporting hazardous materials or dangerous goods, one must receive proper training and certification from a qualified instructor and refer to the current year's Code of Federal Regulations Title 49 (49CFR) or your country's shipping regulations. In matters regarding workplace safety, refer to current OSHA regulations (29CFR) and NIOSH guidelines or your own country's health and safety regulations. No one should ever enter into a hazardous environment without proper training from qualified instructors.

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