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2D Structure
Also known as: Propanoic acid, 79-09-4, Ethylformic acid, Methylacetic acid, Carboxyethane, Metacetonic acid
Molecular Formula
C3H6O2
Molecular Weight
74.08  g/mol
InChI Key
XBDQKXXYIPTUBI-UHFFFAOYSA-N
FDA UNII
JHU490RVYR

propionic acid 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
propanoic acid
2.1.2 InChI
InChI=1S/C3H6O2/c1-2-3(4)5/h2H2,1H3,(H,4,5)
2.1.3 InChI Key
XBDQKXXYIPTUBI-UHFFFAOYSA-N
2.1.4 Canonical SMILES
CCC(=O)O
2.2 Other Identifiers
2.2.1 UNII
JHU490RVYR
2.3 Synonyms
2.3.1 MeSH Synonyms

1. Chromium Propionate

2. Ethylformic Acid

3. Lithium Propanoate

4. Monoprop

5. Potassium Propionate

6. Propionic Acid, Zinc Salt

7. Zinc Propionate

2.3.2 Depositor-Supplied Synonyms

1. Propanoic Acid

2. 79-09-4

3. Ethylformic Acid

4. Methylacetic Acid

5. Carboxyethane

6. Metacetonic Acid

7. Ethanecarboxylic Acid

8. Pseudoacetic Acid

9. Luprosil

10. Monoprop

11. Propionate

12. Prozoin

13. Antischim B

14. Propionoic Acid

15. Acide Propionique

16. Methyl Acetic Acid

17. Sentry Grain Preserver

18. C3 Acid

19. Tenox P Grain Preservative

20. Caswell No. 707

21. Propionic Acid Grain Preserver

22. Fema No. 2924

23. Propionsaeure

24. Propcorn

25. Propkorn

26. Propoic Acid

27. Propioic Acid

28. Acide Propanoique

29. Propionic Acid (natural)

30. Kyselina Propionova

31. Carboxylic Acids, C1-5

32. Acide Propionique [french]

33. Kyselina Propionova [czech]

34. Ccris 6096

35. Proprionic Acid

36. C1-5 Carboxylic Acids

37. Epa Pesticide Chemical Code 077702

38. Fatty Acids, C3-24

39. Hsdb 1192

40. N-propionic Acid

41. Toxi-check

42. Ai3-04167

43. Ch3-ch2-cooh

44. Un1848

45. Brn 0506071

46. Propionic Acid [nf]

47. Chebi:30768

48. Jhu490rvyr

49. Chembl14021

50. Ins No.280

51. 68937-68-8

52. Ins-280

53. Metacetonate

54. Propanate

55. Pseudoacetate

56. Ethanecarboxylate

57. 68990-37-4

58. Propionic Acid (nf)

59. Propionic Acid [un1848] [corrosive]

60. E-280

61. Propionic Acid, >=99.5%

62. Propanyl Acid

63. Fema Number 2924

64. Einecs 201-176-3

65. Unii-jhu490rvyr

66. Mfcd00002756

67. Luprisol

68. Proponic Acid

69. 1-propanoic Acid

70. 2-methylacetic Acid

71. Einecs 273-079-4

72. Etco2h

73. Propionic Acid Solution

74. Propionic Acid, 99%

75. Propanoic Acid (9ci)

76. C2h5cooh

77. Dsstox_cid_5961

78. Bmse000179

79. Epitope Id:139981

80. Propionic Acid, >=99%

81. Propionic Acid, 99.5%

82. Ec 201-176-3

83. Propionic Acid [mi]

84. Dsstox_gsid_25961

85. Propionic Acid Reagent Grade

86. Natural Propionic Acid

87. Propionic Acid (6ci,8ci)

88. Propionic Acid [fcc]

89. 4-02-00-00695 (beilstein Handbook Reference)

90. Propionic Acid, 99%, Fcc

91. Propionic Acid [fhfi]

92. Propionic Acid [hsdb]

93. Propionic Acid [inci]

94. Propionic Acid [vandf]

95. Gtpl1062

96. Propionic Acid [mart.]

97. Dtxsid8025961

98. Propionic Acid [usp-rs]

99. Propionic Acid [who-dd]

100. Amy4114

101. Top Distillation Cut By-product Acids, Monobasic (c1-c5)

102. Methylacetic Acid, Propanoic Acid

103. Dtxsid001015846

104. Propionic Acid, Acs Reagent Grade

105. Carboxymethoxylaminehemihydrochloride

106. Propionic Acid, Analytical Standard

107. Zinc6050663

108. Propionic Acid, Natural, 99%, Fg

109. Tox21_304030

110. Bdbm50082199

111. Lmfa01010003

112. Stl168039

113. Propionic Acid, Feed Grade, 98.7%

114. Akos000118853

115. Db03766

116. Un 1848

117. Cas-79-09-4

118. Propionic Acid, For Synthesis, 99.5%

119. Ncgc00357239-01

120. Propionic Acid, >=99.5%, Fcc, Fg

121. Bp-20411

122. E280

123. Propionic Acid 100 Microg/ml In Ethanol

124. Propionic Acid, Acs Reagent, >=99.5%

125. Ft-0637136

126. Ft-0658557

127. P0500

128. Propionic Acid 100 Microg/ml In Cyclohexane

129. Propionic Acid, Saj First Grade, >=98.0%

130. C00163

131. D02310

132. Propionic Acid 1000 Microg/ml In Acetonitrile

133. Propionic Acid, Puriss. P.a., >=99.5% (gc)

134. Q422956

135. F2191-0098

136. Propionic Acid, Bioreagent, Suitable For Insect Cell Culture, ~99%

137. Propionic Acid, United States Pharmacopeia (usp) Reference Standard

2.4 Create Date
2004-09-16
3 Chemical and Physical Properties
Molecular Weight 74.08 g/mol
Molecular Formula C3H6O2
XLogP30.3
Hydrogen Bond Donor Count1
Hydrogen Bond Acceptor Count2
Rotatable Bond Count1
Exact Mass74.036779430 g/mol
Monoisotopic Mass74.036779430 g/mol
Topological Polar Surface Area37.3 Ų
Heavy Atom Count5
Formal Charge0
Complexity40.2
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
Covalently Bonded Unit Count1
4 Drug and Medication Information
4.1 Therapeutic Uses

VET: Useful orally in ruminants as an antiketogenic agent ... it also stimulates rumen development in calves. /Propionic acid and salts/

Rossoff, I.S. Handbook of Veterinary Drugs. New York: Springer Publishing Company, 1974., p. 493


VET: ... As topical antifungal agents in various dermatoses.

Rossoff, I.S. Handbook of Veterinary Drugs. New York: Springer Publishing Company, 1974., p. 492


... Treating dermatophytic infections ... /Sodium Propionate/

American Medical Association, AMA Department of Drugs, AMA Drug Evaluations. 3rd ed. Littleton, Massachusetts: PSG Publishing Co., Inc., 1977., p. 822


/VET:/ Propionic acid ... has been used to treat dermatomycoses. Propionic acid is also incorporated in manufactured animal feeds to help control fungal growth. At concentrations above 3 ug/ml it is fungicidal against a toxigenic strain of Aspergillus parasiticus.

Booth, N.H., L.E. McDonald (eds.). Veterinary Pharmacology and Therapeutics. 5th ed. Ames, Iowa: Iowa State University Press, 1982., p. 772


For more Therapeutic Uses (Complete) data for PROPIONIC ACID (8 total), please visit the HSDB record page.


4.2 Drug Warning

Both their low efficacy and exaggerated price make /propionic acid and sodium propionate/ irrational choices for treatment /of dermatomycoses/...

Hardman, J.G., L.E. Limbird, P.B., A.G. Gilman. Goodman and Gilman's The Pharmacological Basis of Therapeutics. 10th ed. New York, NY: McGraw-Hill, 2001., p. 1310


4.3 Drug Indication

Propanoic acid and various direct sodium or calcium salt formulations of the acid are currently most commonly approved and indicated by organizations like the FDA and EMA for use as an antibacterial food additive preservative in animal feed and food for human consumption. Similarly, although the use of propanoic acid or any of its direct sodium or calcium salt formulations as excipient ingredients in pharmaceuticals is not necessarily a major role for the compound today, sodium propionate was used in some vaginal cream preparations indicated for cervicitis, cervical tears, and/or postcauterization, postcryosurgery, and postconization of the cervix. In such products, the sodium propionate was primarily used to elicit a preservative, bacteriostatic effect while other active ingredients combined in the formulation like urea, benzalkonium chloride, inositol, and methionine and cystine amino acids facilitated debridement, enhanced medication spread, epithelialization promotion, and wound healing, respectively. Nevertheless, a great variety of propionic acid derivatives exist as separate pharmaceuticals, each with their own unique therapeutic categories, pharmacodynamics, and pharmacokinetics.


5 Pharmacology and Biochemistry
5.1 Pharmacology

As a naturally occurring carboxylic acid, propionic acid typically undergoes metabolism via conversion to propionyl coenzyme A (propionyl-CoA), which is part of the usual metabolic pathway that carboxylic acids participate within in the human body. Most of propionic acid's antibacterial and preservative activities subsequently stem from this metabolic pathway as the metabolic fate of propionates varies in different microorganisms, resulting in antimicrobial mechanisms of action that may revolve around differing propionate metabolites causing competition, inhibition, and/or interference effects along other metabolic pathways in the various microorganisms affected. In the human body, however, propionic acid is generally metabolized with little ill effect and ultimately becomes a chemical intermediate in the citric acid cycle.


5.2 Absorption, Distribution and Excretion

Absorption

Some propionic acid is oxidized to lactic acid during absorption, but most passes to the liver, which removes nearly all of it from the portal blood. Propionic acid represents 20-25% of absorbed volatile fatty acids. Propionic acid is rapidly absorbed through the gastrointestinal tract.


Route of Elimination

Most absorbed propionic acid is passed to the liver, which removes nearly all of it from the portal blood. Three days after a single oral administration of labeled sodium propionate, 77% of the radioactivity was found in expired air, and 7% in urine and feces.


Volume of Distribution

Three days after a single oral administration of labeled sodium propionate, 77% of the radioactivity was found in expired air, and 7% in urine and feces. The radioactivity found in skin, liver, intestine, and adipose tissue was 3.9, 1.1, 0.9, and 0.7%, respectively. Readily accessible data regarding the volume of distribution of propionic acid is not available.


Clearance

Readily accessible data regarding the clearance of propionic acid is not available.


Some propionic acid is oxidized to lactic acid during absorption but most passes to the liver, which removes nearly all of it from the portal blood ... propionic acid ... represents 20-25% of absorbed volatile fatty acids.

Jones, L.M., et al. Veterinary Pharmacology & Therapeutics. 4th ed. Ames: Iowa State University Press, 1977., p. 736


Three days after a single oral admin of labeled sodium propionate, 77% of the radioactivity was found in expired air, and 7% in urine and feces. The radioactivity found in skin, liver, intestine, and adipose tissue was 3.9, 1.1, 0.9, and 0.7%, respectively.

KOZUKA H ET AL; EISEI KAGAKU 27 (5): 303-8 (1981)


Propionic acid is rapidly absorbed through the gastrointestinal tract and, even after large doses, very little is excreted in the urine.

Bingham, E.; Cohrssen, B.; Powell, C.H.; Patty's Toxicology Volumes 1-9 5th ed. John Wiley & Sons. New York, N.Y. (2001)., p. 5:706


... In the forestomachs of rats fed 4% PA in powdered diet, the amount of PA in hyperplasias (1553 | 508 mug PA/g tissue) was three times higher than that in the remainder of the tissue (479 | 247 mug PA/g tissue). The PA content decreased progressively towards the glandular parts.

PMID:8473000 Bueld JE, Netter KJ; Food Chem Toxicol 31 (3): 169-176 (1993)


5.3 Metabolism/Metabolites

Propionic acid is first converted to propionyl coenzyme A (propionyl-CoA), however, it directly enter either beta oxidation or the citric acid cycles. As propionic acid has three carbons, propionyl-CoA. In the majority of vertebrates, propionyl-CoA is carboxylated to D-methylmalonyl-CoA, which is then isomerised to L-methylmalonyl-CoA. A vitamin B12-dependent enzyme catalyzes rearrangement of L-methylmalonyl-CoA to succinyl-CoA, which can then be used as a substrate in the citric acid cycle.


Propionate is formed as the terminal three-carbon fragment (as propionyl-coenzyme A) in the oxidation of odd-number carbon fatty acids and from oxidation of the side chain of cholesterol. Radioactivity from propionate admin to fasting rats may appear in glycogen, glucose, citric acid cycle intermediates, amino acids, and proteins. The route of metabolism of propionic acid involves interaction with coenzyme A, carboxylation to form methylmalonyl-coenzyme A, and conversion to succinic acid, which enters the citric acid cycle. Propionic acid may be oxidized without forming ketone bodies and in contrast to acetic acid, is incorporated into a carbohydrate as well as lipid.

Bingham, E.; Cohrssen, B.; Powell, C.H.; Patty's Toxicology Volumes 1-9 5th ed. John Wiley & Sons. New York, N.Y. (2001)., p. 5:706


The metab of radiolabeled sodium propionate was studied in rats three days after a single oral admin. Among the liver extracts, 89% of the liver radioactivity was found in trichloroacetic acid precipitated fraction, and 10% in glycogen.

KOZUKA H ET AL; EISEI KAGAKU 27 (5): 303-8 (1981)


Treatment with L-carnitine greatly enhanced the formation and excretion of short-chain acylcarnitines in three patients with propionic acidemia and in three normal controls. Mass spectrometry ... identified the acylcarnitine as propionylcarnitine in patients with propionic acidemia. The normal children excreted mostly acetylcarnitine. Propionic acidemia and other organic acidurias are characterized by the intramitochondrial accumulation of short-chain acyl-Coenzyme A (CoA) compounds. The substrate specificity of the carnitine acetyltransferase enzyme and its steady state nature appears to facilitate elimination of propionyl groups while restoring the acyl-acyl-Coenzyme A:free acyl-CoenzymeA ratio in the mitochondrion. L-carnitine may be a useful therapeutic approach for elimination of toxic acyl acyl-Coenzyme A compounds in several of these disorders.

PMID:6725560 Full text: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC437091 Roe CR et al; J Clin Invest 73 (6): 1785-8 (1984)


Propionic acid (10 mM) inhibited hepatocyte oxidation of 1-(14)C-pyruvate (10 mM) by 60%. This inhibition was not the result of substrate competition, as butyric acid had minimal effects on pyruvate oxidation. ... Propionic acid also inhibited oxidation of 1-(14)C palmitic acid (0.8 mM) by hepatocytes isolated from fed rats. ... These results demonstrate that propionic acid interferes with oxidative metabolism in intact hepatocytes.

PMID:3790065 Full text: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1146796 Brass EP et al; Biochem J 236 (1): 131-6 (1986)


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


5.4 Biological Half-Life

The half-life of iv sodium propionate administered in the sheep animal model is about 6.9 +/- 0.4 minutes.


The t1/2 of the iv sodium propionate load ... from 6.9 +/- 0.4 min in the control sheep ... . /Sodium propionate/

PMID:4014846 Grohn Y et al; Am J Vet Res 46 (4): 952-8 (1985)


5.5 Mechanism of Action

The metabolic fate of propionates varies in different microorganisms. Some have enzyme systems that can convert succinate to propionyl-coenzyme A and through various further steps to propionate, CO2, or propionyl phoshpate. Still others can convert propionic acid to B-alanine or directly to CO2. Whatever the case, the inhibiting effect for microbials is likely related to competition with acetate in the acetokinase system, to the blockage of pyruvate conversion to acetyl-coenzyme A and to interference with B-alanine in pantothenic acid syntheses. Moreover, other studies suggest the antimicrobial activity of propionic acid revolves around its ability to reduce the pH of its immediate environment to levels of acidity that are harmful to pathogenic microbes as well as its ability to dissociate such that its lipid soluble undissociated form is capable of entering microbial cells. Additionally, there are also studies that suggest that propionic acid's antifungal activity may be the result of propionyl-CoA inhibiting glucose metabolism in certain species of fungus via the accumulation of the CoA-derivative.