Chemical of the Week Part 2 - Acetic Acid

Hazard Profile

Chemical Name and Pseudonyms

Acetic Acid, Ethanoic Acid, Glacial Acetic Acid (pure compound), Methanocaboxylic Acid,  

UN Number

2790 (10-80% acid), 2789 (>80% acid)

Chemical Formula

CH₃COOH

Hazards

Corrosive, flammable

PPE Considerations

SFPC or CPC with SCBA

Fire Fighting Considerations

Dry chemical, dry powder, CO_2, AR-AFFF.  Keep tanks cool if exposed to fire/heat.

Decontamination

Flush skin/contact areas if exposed, soap and water

Detection and Monitoring

Colormetric, electrochemical sensor, 4/5-gas, IP=10.66 eV.  Note use of electronic sensors only if equipment can be protected from corrosion.

Chemical and Physical Properties

Physical State

Colorless liquid or crystals with vinegar-like odor

Vapor Pressure

~11 mmHg

Boiling Point

~244^oF

Vapor Density

~2.07

Specific Gravity

~1.05

Miscibility

Soluble in water

Flash Point

103^oF

LEL/UEL

~4%/19%

Autoignition Temp

~800^oF

pH

<2.5

Toxicity

IDLH

50 ppm

PEL/REL/STEL

10 ppm / 10 ppm/ 15 ppm

LD50

3310 mg/kg

LC50

>40 mg/l

Radioactive (Yes/No)

No

Medical

Toxicological Considerations

Significant irritant to skin, eyes, respiratory tract

Signs/Symptoms of Exposure

Respiratory symptoms, skin irritation/burns, eye damage

Medical Treatment

Fresh air and treat symptomatically, flush areas of contact with water

Other Information

Reacts with oxidizers and strong caustics, corrosive to metals and skin

Chemical Structure