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tert-Butyl alcohol

Synonyms & Trade Names
2-Methyl-2-propanol, Trimethyl carbinol
CAS No.
75-65-0
RTECS No.
EO1925000
DOT ID & Guide
1120 129
Formula
(CH₃)₃COH
Conversion
1 ppm = 3.03 mg/m3
IDLH
1600 ppm
See: 75650
Exposure Limits
NIOSH REL
TWA 100 ppm (300 mg/m3) ST 150 ppm (450 mg/m3)
OSHA PEL
TWA 100 ppm (300 mg/m3) See Appendix G
Measurement Methods
NIOSH 1400;
OSHA 7
See: NMAM or OSHA Methods
Physical Description
Colorless solid or liquid (above 77°F) with a camphor-like odor. [Note: Often used in aqueous solutions.]
Molecular Weight
74.1
Boiling Point
180°F
Freezing Point
78°F
Solubility
Miscible
Vapor Pressure
(77°F): 42 mmHg
Ionization Potential
9.70 eV
Specific Gravity
0.79 (Solid)
Flash Point
52°F
Upper Exposive Limit
8.0%
Lower Explosive Limit
2.4%
Combustible Solid Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities
Strong mineral acids, strong hydrochloric acid, oxidizers
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, nose, throat; drowsiness, narcosis
Target Organs
Eyes, skin, respiratory system, central nervous system
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 1600 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode£
(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)£
(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 = 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

See also
INTRODUCTION   ICSC CARD: 0114

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