Methyl acetate |
Synonyms & Trade Names Methyl ester of acetic acid, Methyl ethanoate |
CAS No. 79-20-9 |
RTECS No. AI9100000 |
DOT ID & Guide 1231 129 |
FormulaCH3COOCH3 |
Conversion 1 ppm = 3.03 mg/m3 |
IDLH 3100 ppm [10%LEL]
See: 79209 |
Exposure Limits NIOSH REL: TWA 200 ppm (610 mg/m3) ST 250 ppm (760 mg/m3)
OSHA PEL†: TWA 200 ppm (610 mg/m3) |
Measurement Methods
NIOSH 1458;
OSHA 7
See: NMAM or OSHA Methods |
Physical Description Colorless liquid with a fragrant, fruity odor. |
MW: 74.1 |
BP: 135°F |
FRZ: -145°F |
Sol: 25% |
VP: 173 mmHg |
IP: 10.27 eV |
Sp.Gr: 0.93 |
Fl.P: 14°F |
UEL: 16% |
LEL: 3.1% |
|
|
| Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F. |
Incompatibilities & Reactivities Nitrates; strong oxidizers, alkalis & acids; water [Note: Reacts slowly with water to form acetic acid & methanol.] |
Exposure Routes inhalation, ingestion, skin and/or eye contact |
Symptoms irritation eyes, skin, nose, throat; headache, drowsiness; optic nerve atrophy; chest tightness; in animals: narcosis |
Target Organs Eyes, skin, respiratory system, central nervous 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 2000 ppm:
(APF = 10) Any chemical cartridge respirator with organic vapor cartridge(s)*
(APF = 10) Any supplied-air respirator* Up to 3100 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 See ICSC CARD: 0507
|
