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2D Structure
Also known as: Dichloralantipyrine, 480-30-8, Dichloralphenazone civ, Antipyrine, compound with chloral hydrate (1:2), 1,2-dihydro-1,5-dimethyl-2-phenyl-3h-pyrazol-3-one, compd. with 2,2,2-trichloro-1,1-ethanediol (1:2), Yyx637r279
Molecular Formula
C15H18Cl6N2O5
Molecular Weight
519.0  g/mol
InChI Key
ATKXDQOHNICLQW-UHFFFAOYSA-N
FDA UNII
YYX637R279

Dichloralphenazone is a sedative composed of chloral hydrate and phenazone. It is typically found in combination products Nodolor and Midrin containing [isometheptene] and [acetaminophen] used for the relief of tension and vascular headaches. It is a US Schedule IV drug and its clinical use is limited.
1 2D Structure

2D Structure

2 Identification
2.1 Computed Descriptors
2.1.1 IUPAC Name
1,5-dimethyl-2-phenylpyrazol-3-one;2,2,2-trichloroethane-1,1-diol
2.1.2 InChI
InChI=1S/C11H12N2O.2C2H3Cl3O2/c1-9-8-11(14)13(12(9)2)10-6-4-3-5-7-10;2*3-2(4,5)1(6)7/h3-8H,1-2H3;2*1,6-7H
2.1.3 InChI Key
ATKXDQOHNICLQW-UHFFFAOYSA-N
2.1.4 Canonical SMILES
CC1=CC(=O)N(N1C)C2=CC=CC=C2.C(C(Cl)(Cl)Cl)(O)O.C(C(Cl)(Cl)Cl)(O)O
2.2 Other Identifiers
2.2.1 UNII
YYX637R279
2.3 Synonyms
2.3.1 MeSH Synonyms

1. Dichloralantipyrine

2.3.2 Depositor-Supplied Synonyms

1. Dichloralantipyrine

2. 480-30-8

3. Dichloralphenazone Civ

4. Antipyrine, Compound With Chloral Hydrate (1:2)

5. 1,2-dihydro-1,5-dimethyl-2-phenyl-3h-pyrazol-3-one, Compd. With 2,2,2-trichloro-1,1-ethanediol (1:2)

6. Yyx637r279

7. Kloralfenazon

8. Dormuphar

9. Ibiodorm

10. Sominat

11. Welldorm

12. Sedor

13. Dichloralantipyrin

14. Einecs 207-546-0

15. Unii-yyx637r279

16. 3h-pyrazol-3-one, 1,2-dihydro-1,5-dimethyl-2-phenyl-, Compd. With 2,2,2-trichloro-1,1-ethanediol (1:2)

17. Dichloralphenazone [usp:inn:ban]

18. Dichloralphenazone (usp)

19. 1,2-dihydro-1,5-dimethyl-2-phenyl-3h-pyrazol-3-one, Compound With 2,2,2-trichloroethane-1,1-diol (1:2)

20. Schembl115159

21. Antipyrine, Compd. With Chloral Hydrate (1:2)

22. Dichloralphenazone [mi]

23. Chembl1697834

24. Dtxsid2022919

25. Dichloralphenazone [vandf]

26. Dichloralphenazone [mart.]

27. Dichloralphenazone [who-dd]

28. 1,5-dimethyl-2-phenylpyrazol-3-one;2,2,2-trichloroethane-1,1-diol

29. Db01495

30. Dichloralphenazone Civ [usp-rs]

31. Dichloralphenazone [usp Impurity]

32. Ft-0750065

33. D03785

34. Q5272471

35. 1,2-dihydro-1,5-dimethyl-2-phenyl-3h-pyrazol-3-one Compd. With 2,2,2-trichloro-1,1-ethanediol (1:2)

36. 1,5-dimethyl-2-phenyl-1,2-dihydro-3h-pyrazol-3-one - 2,2,2-trichloroethane-1,1-diol (1:2)

37. 1,5-dimethyl-2-phenyl-1h-pyrazol-3(2h)-one Compound With 2,2,2-trichloroethane-1,1-diol (1:2)

2.4 Create Date
2005-08-08
3 Chemical and Physical Properties
Molecular Weight 519.0 g/mol
Molecular Formula C15H18Cl6N2O5
Hydrogen Bond Donor Count4
Hydrogen Bond Acceptor Count6
Rotatable Bond Count1
Exact Mass517.931738 g/mol
Monoisotopic Mass515.934688 g/mol
Topological Polar Surface Area105 Ų
Heavy Atom Count28
Formal Charge0
Complexity323
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
Covalently Bonded Unit Count3
4 Pharmacology and Biochemistry
4.1 ATC Code

N - Nervous system

N05 - Psycholeptics

N05C - Hypnotics and sedatives

N05CC - Aldehydes and derivatives

N05CC04 - Dichloralphenazone