Agent Name

Propionic acid

CAS Number

79-09-4

Formula

C3-H6-O2

Major Category

Other Classes

Synonyms

Acide propionique [French]; C3 acid; Carboxyethane; Ethanecarboxylic acid; Ethylformic acid; Kyselina propionova [Czech]; Luprosil; Metacetonic acid; Methyl acetic acid; Methylacetic acid; Monoprop; Propanoic acid; Propionic acid; Propionic acid (natural); Propionic acid grain preserver; Propionoic acid; Prozoin; Pseudoacetic acid; Sentry grain preserver; Tenox P grain preservative; [ChemIDplus] UN1848

Category

Organic Acids

Description

Colorless, oily liquid with a pungent, disagreeable, rancid odor. [Note: A solid below 5 degrees F.]; [NIOSH]

Sources/Uses

Used as a fungicide, herbicide and emulsifying agent; it occurs naturally in cheese and is an approved food preservative. [ACGIH]

Comments

Liquid causes second degree burns after contact for a few minutes. [CHRIS] Corrosive to skin; [Quick CPC] [Acute irritant contact dermatitis from propionic acid used in animal feed preservation. Contact Dermatitis. Henschel R, et al. 1999 Jun;40(6):328. No abstract available.] A skin, eye, and respiratory tract irritant; [ICSC]

Reference Link

EPA Pesticide Chemical Search

Exposure Assessment
Skin Designation (ACGIH)

Insufficient data

TLV (ACGIH)

10 ppm

MAK

10 ppm

Vapor Pressure

3 mm Hg

Odor Threshold Low

0.02 ppm

Odor Threshold High

0.17 ppm

Explanatory Notes

Detection odor threshold from AIHA (mean = 0.066 ppm); Flash point = 52 deg C;

Reference Link

ICSC: Propionic acid

Adverse Effects
Dermatotoxin

Skin Burns

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Biomedical References

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Processes

Industrial Processes with risk of exposure:

Activities

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