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Methyl methacrylate

Synonyms & Trade Names
Methacrylate monomer, Methyl ester of methacrylic acid, Methyl-2-methyl-2-propenoate
CAS No.
80-62-6
RTECS No.
OZ5075000
DOT ID & Guide
1247 129P(inhibited)
Formula
CH₂=C(CH₃)COOCH₃
Conversion
1 ppm = 4.09 mg/m3
IDLH
1000 ppm
See: 80626
Exposure Limits
NIOSH REL
TWA 100 ppm (410 mg/m3)
OSHA PEL
TWA 100 ppm (410 mg/m3)
Measurement Methods
NIOSH 2537;
OSHA 94
See: NMAM or OSHA Methods
Physical Description
Colorless liquid with an acrid, fruity odor.
Molecular Weight
100.1
Boiling Point
214°F
Freezing Point
-54°F
Solubility
1.5%
Vapor Pressure
29 mmHg
Ionization Potential
9.70 eV
Specific Gravity
0.94
Flash Point
(oc) 50°F
Upper Exposive Limit
8.2%
Lower Explosive Limit
1.7%
Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities
Nitrates, oxidizers, peroxides, strong alkalis, moisture [Note: May polymerize if subjected to heat, oxidizers, or ultraviolet light. Usually contains an inhibitor such as hydroquinone.]
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, nose, throat; dermatitis
Target Organs
Eyes, skin, respiratory system
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet (flammable)
Change:No recommendation
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Water flush promptly
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH/OSHA

Up to 1000 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode£
(APF = 50) Any chemical cartridge respirator with a full facepiece and organic vapor cartridge(s)
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister
(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)£
(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

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 0300

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