|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Methyl acetate | CAS 79-20-9 | ||
| CH3COOCH3 | RTECS AI9100000 | ||
|
Synonyms & Trade Names Methyl ester of acetic acid, Methyl ethanoate |
DOT ID & Guide 1231 129 |
||
|
Exposure Limits |
NIOSH REL: TWA 200 ppm (610 mg/m3) ST 250 ppm (760 mg/m3) | ||
| OSHA PEL�: TWA 200 ppm (610 mg/m3) | |||
| IDLH 3100 ppm [10%LEL] | Conversion 1 ppm = 3.03 mg/m3 | ||
|
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.] |
|||
|
Measurement Methods NIOSH 1458; OSHA 7 See: NMAM or OSHA Methods |
|
Personal Protection & Sanitation 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 |
|
| 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 |
|
| See also: INTRODUCTION |