Date published: 2026-4-28

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Diphacinone (CAS 82-66-6)

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Alternate Names:
diphenadione; 2-diphenylacetylindan-1,3-dione
Application:
Diphacinone is an anticoagulant rodenticide used to control infestations
CAS Number:
82-66-6
Molecular Weight:
340.37
Molecular Formula:
C23H16O3
Supplemental Information:
This is classified as a Dangerous Good for transport and may be subject to additional shipping charges.
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

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Diphacinone is an anticoagulant rodenticide widely used to control rodent infestations. Rodenticide anticoagulants inhibit the dithiothreitol-dependent vitamin K reductase reactions and prevent vitamin K hydroquinone regeneration, which is evident by the significant increase in serum vitamin 2,3 epoxide levels and a concurrent increase in the serum vitamin K epoxide-vitamin K ratio. Inhibition of vitamin K reductases indirectly inhibits active prothrombin complex protein formation. Rodenticide anticoagulants inhibit vitamin K regeneration almost immediately, but the anticoagulant effect is delayed until the vitamin K stores are depleted and sufficient active coagulation factors are removed from circulation.


Diphacinone (CAS 82-66-6) References

  1. Diphenadione residues in milk of cattle.  |  Bullard, RW., et al. 1976. J Agric Food Chem. 25: 79-81. PMID: 1036746
  2. Determination of chlorophacinone and diphenadione residues in biological materials.  |  Bullard, RW., et al. 1975. J Agric Food Chem. 23: 72-4. PMID: 1173369
  3. DIPHENADIONE AS AN ANTICOAGULANT IN ACUTE MYOCARDIAL INFARCTION.  |  VALERO, A. 1964. Isr Med J. 23: 111-5. PMID: 14197002
  4. Confirmation of indandione rodenticide toxicoses by mass spectrometry/mass spectrometry.  |  Braselton, WE., et al. 1992. J Vet Diagn Invest. 4: 441-6. PMID: 1457548
  5. Determination of the rodenticides warfarin, diphenadione and chlorophacinone in soil samples by HPLC-DAD.  |  Medvedovici, A., et al. 1997. Talanta. 44: 1633-40. PMID: 18966902
  6. Anticoagulant rodenticide screening in dogs: 123 cases (1996-2003).  |  Waddell, LS., et al. 2013. J Am Vet Med Assoc. 242: 516-21. PMID: 23363284
  7. Toxicokinetics and coagulopathy threshold of the rodenticide diphacinone in eastern screech-owls (Megascops asio).  |  Rattner, BA., et al. 2014. Environ Toxicol Chem. 33: 74-81. PMID: 24014246
  8. Effectiveness of rodenticides for managing invasive roof rats and native deer mice in orchards.  |  Baldwin, RA., et al. 2014. Environ Sci Pollut Res Int. 21: 5795-802. PMID: 24443051
  9. Nontarget mortality of New Zealand lesser short-tailed bats (Mystacina tuberculata) caused by diphacinone.  |  Dennis, GC. and Gartrell, BD. 2015. J Wildl Dis. 51: 177-86. PMID: 25375946
  10. Cluster of cases of massive hemorrhage associated with anticoagulant detection in race horses.  |  Carvallo, FR., et al. 2015. J Vet Diagn Invest. 27: 112-6. PMID: 25525145
  11. Ultrasensitive determination of diphacinone by flow injection chemiluminescence: application to quantification in biofluids and photodegradation monitoring in water samples.  |  Tan, X., et al. 2014. J AOAC Int. 97: 1725-9. PMID: 25632450
  12. Diagnostic importance of vitamin K1 and its epoxide measured in serum of dogs exposed to an anticoagulant rodenticide.  |  Mount, ME. and Kass, PH. 1989. Am J Vet Res. 50: 1704-9. PMID: 2802299
  13. Potential impact of diphacinone application strategies on secondary exposure risk in a common rodent pest: implications for management of California ground squirrels.  |  Baldwin, RA., et al. 2021. Environ Sci Pollut Res Int. 28: 45891-45902. PMID: 33881695
  14. Toxicokinetic analysis of the anticoagulant rodenticides warfarin & diphacinone in Egyptian fruit bats (Rousettus aegyptiacus) as a comparative sensitivity assessment for Bonin fruit bats (Pteropus pselaphon).  |  Takeda, K., et al. 2022. Ecotoxicol Environ Saf. 243: 113971. PMID: 35981482
  15. Vampire bat control by systemic treatment of livestock with an anticoagulant.  |  Thompson, RD., et al. 1972. Science. 177: 806-8. PMID: 5068491

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

Diphacinone, 100 mg

sc-257374
100 mg
$240.00