# NIOSH Pocket Guide to Chemical Hazards
Acrylic acid | CAS 79-10-7
CH2=CHCOOH | RTECS AS4375000
Synonyms & Trade Names Acroleic acid, Aqueous acrylic acid (technical grade is 94%), Ethylenecarboxylic acid, Glacial acrylic acid (98% in aqueous solution), 2-Propenoic acid | DOT ID & Guide 2218 132P (inhibited)
Exposure Limits | NIOSH REL: TWA 2 ppm (6 mg/m3) [skin]
OSHA PEL†: none
IDLH N.D. | Conversion 1 ppm = 2.95 mg/m3
Physical Description Colorless liquid or solid (below 55°F) with a distinctive, acrid odor. [Note: Shipped with an inhibitor (e.g., hydroquinone) since it readily polymerizes.]
MW: 72.1 | BP: 286°F | FRZ: 55°F | Sol: Miscible
VP: 3 mmHg | IP: ? |  | Sp.Gr: 1.05
Fl.P: 121°F | UEL: 8.02% | LEL: 2.4% |
Class II Combustible Liquid: Fl.P. at or above 100°F and below 140°F.
Incompatibilities & Reactivities Oxidizers, amines, alkalis, ammonium hydroxide, chloro-sulfonic acid, oleum, ethylene diamine, ethyleneimine, 2-aminoethanol [Note: Corrosive to many metals.]
Measurement Methods OSHA 28, PV2005
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: No recommendation Provide: Eyewash, Quick drench | First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations To be added later
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, respiratory system; eye, skin burns; skin sensitization; in animals: lung, liver, kidney injury
Target Organs Eyes, skin, respiratory system
See also: INTRODUCTION