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2D Structure
Also known as: Prop-2-yn-1-ol, 2-propyn-1-ol, 107-19-7, 2-propynyl alcohol, Ethynylcarbinol, 1-propyn-3-ol
Molecular Formula
C3H4O
Molecular Weight
56.06  g/mol
InChI Key
TVDSBUOJIPERQY-UHFFFAOYSA-N
FDA UNII
E920VF499L

2-Propyn-1-ol is a metabolite found in or produced by Saccharomyces cerevisiae.
1 2D Structure

2D Structure

2 Identification
2.1 Computed Descriptors
2.1.1 IUPAC Name
prop-2-yn-1-ol
2.1.2 InChI
InChI=1S/C3H4O/c1-2-3-4/h1,4H,3H2
2.1.3 InChI Key
TVDSBUOJIPERQY-UHFFFAOYSA-N
2.1.4 Canonical SMILES
C#CCO
2.2 Other Identifiers
2.2.1 UNII
E920VF499L
2.3 Synonyms
2.3.1 MeSH Synonyms

1. 1-propyn-3-ol

2. 2-propyn-1-ol

3. Propargyl Alcohol, Lithium Salt

4. Propargyl Alcohol, Sodium Salt

2.3.2 Depositor-Supplied Synonyms

1. Prop-2-yn-1-ol

2. 2-propyn-1-ol

3. 107-19-7

4. 2-propynyl Alcohol

5. Ethynylcarbinol

6. 1-propyn-3-ol

7. Ethynyl Carbinol

8. Methanol, Ethynyl-

9. Propynyl Alcohol

10. 2-propynol

11. 3-propynol

12. 1-hydroxy-2-propyne

13. 3-hydroxy-1-propyne

14. Acetylenylcarbinol

15. Acetylene Carbinol

16. Agrisynth Pa

17. Propiolic Alcohol

18. Rcra Waste Number P102

19. Prop-2-yne-1-ol

20. Prop-2-in-1-ol

21. Propargylalcohol

22. 1-propyn-3-yl Alcohol

23. Nsc 8804

24. Dtxsid5021883

25. Chebi:28905

26. E920vf499l

27. Nsc-8804

28. Propargyl Alcohol [na1986] [flammable Liquid]

29. 2-propyne-1-ol

30. Ccris 6781

31. Hsdb 6054

32. Einecs 203-471-2

33. Na1986

34. Rcra Waste No. P102

35. Brn 0506003

36. Ethynylmethanol

37. Unii-e920vf499l

38. Ai3-24359

39. Prop-2-ynol

40. Propyn-3-ol

41. 1-propyne-3-ol

42. 2-propyn-1 Ol

43. Mfcd00002912

44. Prop-2-yn-i-ol

45. Prop-1-yn-3-ol

46. Propargyl Alcohol, 99%

47. Bmse000363

48. Ec 203-471-2

49. Hc.$.cch2oh

50. Wln: Q2uu1

51. 4-01-00-02214 (beilstein Handbook Reference)

52. Propargyl Alcohol [mi]

53. Dtxcid301883

54. Chembl1563026

55. Propargyl Alcohol [hsdb]

56. Nsc8804

57. Tox21_200976

58. Bbl011350

59. Stl146440

60. Akos000118737

61. Na 1986

62. Ncgc00091559-01

63. Ncgc00091559-02

64. Ncgc00258529-01

65. Bp-30161

66. Cas-107-19-7

67. P0536

68. En300-19326

69. C05986

70. Inchi=1/c3h4o/c1-2-3-4/h1,4h,3h

71. Q903345

72. Q-201629

73. F0001-0140

2.4 Create Date
2005-03-26
3 Chemical and Physical Properties
Molecular Weight 56.06 g/mol
Molecular Formula C3H4O
XLogP3-0.4
Hydrogen Bond Donor Count1
Hydrogen Bond Acceptor Count1
Rotatable Bond Count0
Exact Mass g/mol
Monoisotopic Mass g/mol
Topological Polar Surface Area20.2
Heavy Atom Count4
Formal Charge0
Complexity38.5
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
Covalently Bonded Unit Count1
4 Pharmacology and Biochemistry
4.1 Absorption, Distribution and Excretion

Propargyl alcohol is quickly distributed and excreted following an iv dose. The majority of the radioactivity ((14)C-labeled test material) was excreted in the urine and as carbon dioxide in the breath of both rats and mice. Oral dosing resulted in a similar rapid (but slower than after iv dosing) excretion pattern, with the bulk of radioactivity being excreted in the urine and exhaled carbon dioxide. Dermal absorption was low due to the volatility of propargyl alcohol. Inhalation exposure resulted in 55 to 63% absorption of inhaled propargyl alcohol at 1 or 10 ppm and only 23 to 33% absorption at 100 ppm. Both species eliminated the majority of the inhaled dose in urine.

EPA/Office of Pollution Prevention and Toxics; High Production Volume (HPV) Challenge Program's Robust Summaries and Test Plans for Propargyl alcohol (December 2002). Available from, as of September 07, 2006: https://cfpub.epa.gov/hpv-s/


... /Propargyl alcohol/ can be absorbed into the body by inhalation of its vapor, through the skin and by ingestion.

IPCS, CEC; International Chemical Safety Card on Propargyl alcohol. (Date of review: April 1997). Available from, as of September 07, 2006: https://www.inchem.org/documents/icsc/icsc/eics0673.htm


Male Sprague-Dawley rats were dosed orally with 40 mg/kg mixture of (1,2,3-(13)C)propargyl alcohol and (1,2-(14)C)propargyl alcohol. Approximately 60% of the dose was excreted in the urine by 96 hr ...

Bingham, E.; Cohrssen, B.; Powell, C.H.; Patty's Toxicology Volumes 1-9 5th ed. John Wiley & Sons. New York, N.Y. (2001)., p. 6:522


4.2 Metabolism/Metabolites

... While oxidative metabolism of low molecular weight primary alcohols is generally ... catalyzed by alcohol dehydrogenase, propargyl alcohol is a relatively poor substrate for this enzyme ... The catalase alternative pathway /was studied/. Bovine liver catalase was used, to measure the rate of oxidative bioactivation of propargyl alcohol to 2-propyn-l-al ... /It was/ found the rate to be higher than predicted ... and hypothesized that the oxidative biotransformation of propargyl alcohol to the more reactive alpha, beta-unsaturated aldehyde by liver catalase might be the initial step in propargyl alcohol induced liver injury.

EPA/Office of Pollution Prevention and Toxics; High Production Volume (HPV) Challenge Program's Robust Summaries and Test Plans for Propargyl alcohol (December 2002). Available from, as of September 07, 2006: https://cfpub.epa.gov/hpv-s/


Chromatographic analysis indicated that propargyl alcohol is extensively metabolized and one metabolite was identified as a glutathione conjugate. It was assumed that there are multiple glutathione conjugates across the triple bond ...

EPA/Office of Pollution Prevention and Toxics; High Production Volume (HPV) Challenge Program's Robust Summaries and Test Plans for Propargyl alcohol (December 2002). Available from, as of September 07, 2006: https://cfpub.epa.gov/hpv-s/


... Inactivation of catalase in isolated hepatocytes only partially inhibited the toxicity of propargyl alcohol /was shown/ ... Propargyl alcohol-induced cytotoxicity, rapid GSH depletion and reactive oxygen species (ROS) formation involves metabolic activation by cytochrome P450 rather than catalase or alcohol dehydrogenase /was demonstrated/. Using specific induction and depletion ... /it was shown/ that CYP 2E1 was the enzyme responsible for activation of propargyl alcohol to its aldehyde, 2-propyn-I-al ... /A model was proposed that/ propargyl alcohol is oxidized primarily by CYP 2E1, with a minor contribution by alcohol dehydrogenase, to 2-propyn-l-al. The aldehyde is a chemically active species that can attack vital cellular macromolecules but reacts preferentially with glutathione to form conjugates that undergo urinary excretion. An alternative pathway for the aldehyde is further enzymatic oxidation via aldehyde dehydrogenase to propiolic acid, which could be further, oxidized, conjugated and excreted, or be converted back into the aldehyde ... Depletion of glutathione and formation of ROS (reactive oxygen species), which lends support to the proposed mechanism, /was demonstrated/ ...

EPA/Office of Pollution Prevention and Toxics; High Production Volume (HPV) Challenge Program's Robust Summaries and Test Plans for Propargyl alcohol (December 2002). Available from, as of September 07, 2006: https://cfpub.epa.gov/hpv-s/


Male Sprague-Dawley rats were dosed orally with 40 mg/kg mixture of (1,2,3-(13)C)propargyl alcohol and (1,2-(14)C)propargyl alcohol. Approximately 60% of the dose was excreted in the urine by 96 hr. Major metabolites were identified in the urine by 1- and 2-D NMR and confirmed by isolation and purification of the individual metabolites followed by (13)C FT-NMR and mass spectometry. The proposed pathway involves oxidation of propargyl alcohol to 2-propynoic acid and glutathione conjugation, the first example of multiple glutathione additions to a triple bond. The following final products were identified: 3-((2-(acetylamino)-2-carboxyethyl)thio)-2-propenoic acid, S-S-(3-hydroxypropylidene)-bis(N-acetylcysteine), and 3-((2-(acetylamino)-2-carboxyethyl)-sulfinyl)-3-((2-(acetylamino)-2-carboxyethyl)thio)1-propanol.

Bingham, E.; Cohrssen, B.; Powell, C.H.; Patty's Toxicology Volumes 1-9 5th ed. John Wiley & Sons. New York, N.Y. (2001)., p. 6:522


For more Metabolism/Metabolites (Complete) data for PROPARGYL ALCOHOL (7 total), please visit the HSDB record page.