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Methyl alcohol

Synonyms & Trade Names
Carbinol, Columbian spirits, Methanol, Pyroligneous spirit, Wood alcohol, Wood naphtha, Wood spirit
CAS No.
67-56-1
RTECS No.
PC1400000
DOT ID & Guide
1230 131
Formula
CH₃OH
Conversion
1 ppm = 1.31 mg/m3
IDLH
6000 ppm
See: 67561
Exposure Limits
NIOSH REL
TWA 200 ppm (260 mg/m3) ST 250 ppm (325 mg/m3) [skin]
OSHA PEL
TWA 200 ppm (260 mg/m3) See Appendix G
Measurement Methods
NIOSH 2000 , 3800;
OSHA 91
See: NMAM or OSHA Methods
Physical Description
Colorless liquid with a characteristic pungent odor.
Molecular Weight
32.1
Boiling Point
147°F
Freezing Point
-144°F
Solubility
Miscible
Vapor Pressure
96 mmHg
Ionization Potential
10.84 eV
Specific Gravity
0.79
Flash Point
52°F
Upper Exposive Limit
36%
Lower Explosive Limit
6.0%
Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities
Strong oxidizers
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, upper respiratory system; headache, drowsiness, dizziness, nausea, vomiting; visual disturbance, optic nerve damage (blindness); dermatitis
Target Organs
Eyes, skin, respiratory system, central nervous system, gastrointestinal tract
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 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

See also
INTRODUCTION   ICSC CARD: 0057   MEDICAL TESTS: 0137

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