Methyl formate
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CAS
107-31-3
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HCOOCH3
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RTECS
LQ8925000
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Synonyms & Trade Names
Methyl ester of formic acid, Methyl methanoate
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DOT ID & Guide
1243 / 129
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Exposure
Limits
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NIOSH REL: TWA 100 ppm (250 mg/m3) ST 150 ppm (375 mg/m3)
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OSHA PEL†: TWA 100 ppm (250 mg/m3)
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IDLH
4500 ppm
See: 107313
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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
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BP: 89°F
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FRZ: -148°F
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Sol: 30%
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VP: 476 mmHg
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IP: 10.82 eV
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Sp.Gr: 0.98
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Fl.P: -2°F
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UEL: 23%
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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
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet (flammable)
Change: No recommendation
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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
Important additional information about respirator selection
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Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
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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
See ICSC CARD: 0664 |
