# NIOSH Pocket Guide to Chemical Hazards
Methyl acrylate | CAS 96-33-3
CH2=CHCOOCH3 | RTECS AT2800000
Synonyms & Trade Names Methoxycarbonylethylene, Methyl ester of acrylic acid, Methyl propenoate | DOT ID & Guide 1919 129P (inhibited)
Exposure Limits | NIOSH REL: TWA 10 ppm (35 mg/m3) [skin]
OSHA PEL: TWA 10 ppm (35 mg/m3) [skin]
IDLH 250 ppm | Conversion 1 ppm = 3.52 mg/m3
Physical Description Colorless liquid with an acrid odor.
MW: 86.1 | BP: 176°F | FRZ: -106°F | Sol: 6%
VP: 65 mmHg | IP: 9.90 eV |  | Sp.Gr: 0.96
Fl.P: 27°F | UEL: 25% | LEL: 2.8% |
Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities Nitrates, oxidizers such as peroxides, strong alkalis [Note: Polymerizes easily; usually contains an inhibitor such as hydroquinone.]
Measurement Methods NIOSH 1459; OSHA 92
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet (flammable) Change: No recommendation Provide: Quick drench | First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations NIOSH/OSHA Up to 100 ppm: (APF = 10) Any supplied-air respirator* Up to 250 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode*/(APF = 50) Any self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece Emergency or planned entry into unknown concentrations or IDLH conditions: (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode/(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus Escape: (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, upper respiratory system
Target Organs Eyes, skin, respiratory system
See also: INTRODUCTION