C3H6O2
74.08 g/mol
Food AdditiveDanger
Propionic acid
CAS79-09-4EC201-176-3
Category
Food Additive
Compound Class
Organic Acid
Primary Use
Food preservative and fungicide
Propionic acid is a short-chain fatty acid that occurs naturally in cheese and is widely used as a food preservative and fungicide. Its crystal structure was determined in the early 1960s, confirming its molecular arrangement.
Food preservativeFungicideEmulsifying agent
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
StrongSame Parent
Ammonium propionate
CAS17496-08-1
Preservative and soil fertilizer
ReferenceSame Category
L-lactic acid
CAS79-33-4
Food additive and metabolite
ReferenceSame Category
D-Pantothenic acid
CAS79-83-4
Vitamin B5 for dietary supplementation
ReferenceSame Category
DL-Tryptophan
CAS80206-30-0
essential amino acid
ReferenceSame Category
Grape seed oil
CAS8024-22-4
dietary supplement and emulsifier
Referencestereoisomer of
Sodium propionate
CAS137-40-6
food preservative and mold preventative
Referencestereoisomer of
Cupric propionate
CAS3112-74-1
Research reagent / chemical intermediate
Referencestereoisomer of
Potassium propionate
CAS327-62-8
Food preservative
Safety Reference
Danger
H314Causes severe skin burns and eye damage
H226Flammable liquid and vapour
H318Causes serious eye damage
H335May cause respiratory irritation
H311Toxic in contact with skin
H402Harmful to aquatic life
H303May be harmful if swallowed
H302Harmful if swallowed
Regulatory Compliance1
- CN Catalogue of Hazardous ChemicalsCNRegulation
Customs Tariff Classification
The international HS code for Propionic acid (CAS 79-09-4) is 2915.50.
HS code (international, 6-digit)
2915.50
EU CN code (8-digit)
2915 50 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
propanoic acid
InChIKey
XBDQKXXYIPTUBI-UHFFFAOYSA-N
SMILES
CCC(=O)O
Synonyms (55)
- E-280
- Propionic acid, United States Pharmacopeia (USP)
- 1-propanoic acid
- 2-methylacetic acid
- Acid C3
- Acide propionique
- Acide propionique [French]
- Adofeed
- Antischim B
- C3 acid
- Carboxyethane
- Ethanecarboxylic acid
- INS NO.280
- Kyselina propionova
- Kyselina propionova [Czech]
- Luprisol
- Luprosil
- Metacetonic acid
- Monoprop
- PROPIONIC ACID [MART.]
- Propanoic acid
- Propanoic acid (9CI)
- Propanyl acid
- Propcorn
- Propioic acid
- Propionic acid (6CI,8CI)
- Propionic acid (NF)
- Propionic acid (natural)
- Propionic acid solution
- Propionic acid, feed grade
- Propionic acid, for synthesis
- Propionoic acid
- Propionsaeure
- Propkorn
- Prozoin
- Pseudoacetic acid
- Sentry grain preserver
- Tenox P grain preservative
- Toxi-Check
- acide propanoique
- ethylformic acid
- methylacetic acid
- n-propionic acid
- propionic acid
- propoic acid
- proponic acid
- proprionic acid
- ultra-long-chain fatty acid
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