Propionic acid

CAS 79-09-4 C₃H₆O₂ MW 74.1000 Danger NIOSH data available

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Corrosion

Skull and Crossbones

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Emergency: 911 | Poison Control: 1-800-222-1222

Recommended safety equipment

Personal protective equipment commonly recommended for the hazard classes shown above.

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Hazard Statements

Code	Statement	Hazard Class
`H226`	Flammable liquid and vapor	Flammable liquids
`H303`	May be harmful if swallowed	Acute toxicity, oral
`H311`	Toxic in contact with skin	Acute toxicity, dermal
`H314`	Causes severe skin burns and eye damage	Skin corrosion/irritation
`H318`	Causes serious eye damage	Serious eye damage/eye irritation
`H335`	May cause respiratory irritation	Specific target organ toxicity, single exposure; Respiratory tract irritation

Precautionary Statements

Code	Statement
`P210`	Keep away from heat, hot surface, sparks, open flames and other ignition sources. No smoking.
`P233`	Keep container tightly closed.
`P240`	Ground/bond container and receiving equipment.
`P241`	Use explosion-proof [electrical/ventilating/lighting/.../] equipment.
`P242`	Use only non-sparking tools.
`P243`	Take precautionary measures against static discharge.
`P260`	Do not breathe dust/fume/gas/mist/vapors/spray.
`P261`	Avoid breathing dust/fume/gas/mist/vapors/spray.
`P262`	Do not get in eyes, on skin, or on clothing.
`P264`	Wash hands [and ...] thoroughly after handling.
`P264+P265`	Wash hands [and ...] thoroughly after handling. Do not touch eyes.
`P270`	Do not eat, drink or smoke when using this product.
`P271`	Use only outdoors or in a well-ventilated area.
`P280`	Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/...
`P301+P317`	IF SWALLOWED: Get medical help.
`P301+P330+P331`	IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
`P302+P352`	IF ON SKIN: wash with plenty of water/...
`P302+P361+P354`	IF ON SKIN: Take off Immediately all contaminated clothing. Immediately rinse with water for several minutes.
`P303+P361+P353`	IF ON SKIN (or hair): Take off Immediately all contaminated clothing. Rinse SKIN with water [or shower].
`P304+P340`	IF INHALED: Remove person to fresh air and keep comfortable for breathing.
`P305+P354+P338`	IF IN EYES: Immediately rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing.
`P316`	Get emergency medical help immediately.
`P317`	Get emergency medical help.
`P319`	Get medical help if you feel unwell.
`P321`	Specific treatment (see information on this label and safety datasheet)).
`P361+P364`	Take off immediately all contaminated clothing and wash it before reuse.
`P363`	Wash contaminated clothing before reuse.
`P370+P378`	In case of fire: Use ... to extinguish.
`P403+P233`	Store in a well-ventilated place. Keep container tightly closed.
`P403+P235`	Store in a well-ventilated place. Keep cool.
`P405`	Store locked up.
`P501`	Dispose of contents/container to ...

Exposure Limits

NIOSH REL	10 ppm
NIOSH STEL	15 ppm
Skin Notation	Yes — can be absorbed through skin

Physical Properties

Colorless, oily liquid with a pungent, disagreeable, rancid odor.

Boiling Point	286°F
Flash Point	126°F
Vapor Pressure	3 mmHg
Specific Gravity	0.99

NFPA 704 Diamond

Target Organs

Lungs Skin Eyes

mild irritation of the skin, eyes, and mucosal surfaces

Synonyms

carboxyethane; ethanecarboxylic acid; ethylformic acid; metacetonic acid; methyl acetic acid

Data Sources

GHS Classification: PubChem CID 1032
NIOSH REL/IDLH: NIOSH Pocket Guide

Disclaimer: This information is compiled from public regulatory databases for reference only. It does not replace the manufacturer's Safety Data Sheet (SDS). Always consult the official SDS for your specific product before handling chemicals.

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