Methacrylic acid |
Synonyms & Trade Names Methacrylic acid (glacial), Methacrylic acid (inhibited), ?-Methacrylic acid, 2-Methylacrylic acid, 2-Methylpropenoic acid |
CAS No. 79-41-4 |
RTECS No. OZ2975000 |
DOT ID & Guide 2531 153P (inhibited) |
FormulaCH2=C(CH3)COOH |
Conversion 1 ppm = 3.52 mg/m3 |
IDLH N.D.
See: IDLH INDEX |
Exposure Limits NIOSH REL: TWA 20 ppm (70 mg/m3) [skin]
OSHA PEL†: none |
Measurement Methods
OSHA PV2005
See: NMAM or OSHA Methods |
Physical Description Colorless liquid or solid (below 61°F) with an acrid, repulsive odor. |
MW: 86.1 |
BP: 325°F |
FRZ: 61°F |
Sol(77°F): 9% |
VP: 0.7 mmHg |
IP: ? |
Sp.Gr: 1.02 (Liquid) |
Fl.P(oc): 171°F |
UEL: ? |
LEL: ? |
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| Class IIIA Combustible Liquid: Fl.P. at or above 140°F and below 200°F. |
Incompatibilities & Reactivities Oxidizers, elevated temperatures, hydrochloric acid [Note: Typically contains 100 ppm of the monomethyl ether of hydroquinone to prevent polymerization.] |
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact |
Symptoms irritation eyes, skin, mucous membrane; eye, skin burns |
Target Organs Eyes, skin, respiratory system |
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Personal Protection/Sanitation (See protection codes)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash, Quick drench |
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately |
Respirator Recommendations Not available.
Important additional information about respirator selection |
| See also: INTRODUCTION See ICSC CARD: 0917
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