Methyl alcohol
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CAS
67-56-1
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CH3OH
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RTECS
PC1400000
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Synonyms & Trade Names
Carbinol, Columbian spirits, Methanol, Pyroligneous spirit, Wood alcohol, Wood naphtha, Wood spirit
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DOT ID & Guide
1230 / 131
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Exposure
Limits
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NIOSH REL: TWA 200 ppm (260 mg/m3) ST 250 ppm (325 mg/m3) [skin]
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OSHA PEL†: TWA 200 ppm (260 mg/m3)
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IDLH
6000 ppm
See: 67561
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Conversion
1 ppm = 1.31 mg/m3
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Physical Description
Colorless liquid with a characteristic pungent odor.
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MW: 32.1
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BP: 147°F
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FRZ: -144°F
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Sol: Miscible
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VP: 96 mmHg
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IP: 10.84 eV
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Sp.Gr: 0.79
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Fl.P: 52°F
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UEL: 36%
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LEL: 6.0%
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Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
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Incompatibilities & Reactivities
Strong oxidizers
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Measurement Methods
NIOSH 2000, 3800; OSHA 91
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: Water flush promptly
Breathing: Respiratory support
Swallow: Medical attention immediately
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Respirator Recommendations
NIOSH/OSHA
Up to 2000 ppm:
(APF = 10) Any supplied-air respirator
Up to 5000 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode
Up to 6000 ppm:
(APF = 50) Any supplied-air respirator that has a tight-fitting facepiece and is operated in a continuous-flow mode
(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: 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, skin, upper respiratory system; headache, drowsiness, dizziness, nausea, vomiting; visual disturbance, optic nerve damage (blindness); dermatitis
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Target Organs
Eyes, skin, respiratory system, central nervous system, gastrointestinal tract
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See also: INTRODUCTION
See ICSC CARD: 0057 See MEDICAL TESTS: 0137
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