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| Methyl formate | CAS 107-31-3 | ||
| HCOOCH3 | RTECS LQ8925000 | ||
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Synonyms & Trade Names Methyl ester of formic acid, Methyl methanoate |
DOT ID & Guide 1243 129 |
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Exposure Limits |
NIOSH REL: TWA 100 ppm (250 mg/m3) ST 150 ppm (375 mg/m3) | ||
| OSHA PEL�: TWA 100 ppm (250 mg/m3) | |||
| IDLH 4500 ppm | Conversion 1 ppm = 2.46 mg/m3 | ||
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Physical Description Colorless liquid with a pleasant odor. [Note: A gas above 89°F.] |
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MW: 60.1 |
BP: 89°F |
FRZ: -148°F |
Sol: 30% |
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VP: 476 mmHg |
IP: 10.82 eV |
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Sp.Gr: 0.98 |
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Fl.P: -2°F |
UEL: 23% |
LEL: 4.5% |
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| Class IA Flammable Liquid: Fl.P. below 73�F and BP below 100�F. | |||
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Incompatibilities & Reactivities Strong oxidizers [Note: Reacts slowly with water to form methanol & formic acid.] |
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Measurement Methods NIOSH S291 (II-5); OSHA PV2041 |
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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: Soap wash immediately Breathing: Respiratory support Swallow: Medical attention immediately |
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Respirator Recommendations
NIOSH/OSHA Up to 1000 ppm: (APF = 10) Any supplied-air respirator* Up to 2500 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode* Up to 4500 ppm: (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 |
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| Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact | |
| Symptoms Irritation eyes, nose; chest tightness, dyspnea (breathing difficulty); visual disturbance; central nervous system depression; in animals: pulmonary edema; narcosis | |
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Target Organs
Eyes, respiratory system, central nervous system |
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| See also: INTRODUCTION |