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p-tert-Butyltoluene

Synonyms & Trade Names
4-tert-Butyltoluene, 1-Methyl-4-tert-butylbenzene
CAS No.
98-51-1
RTECS No.
XS8400000
DOT ID & Guide
2667 152
Formula
(CH₃)₃CC₆H₄CH₃
Conversion
1 ppm = 6.07 mg/m3
IDLH
100 ppm
See: 98511
Exposure Limits
NIOSH REL
TWA 10 ppm (60 mg/m3) ST 20 ppm (120 mg/m3)
OSHA PEL
TWA 10 ppm (60 mg/m3) See Appendix G
Measurement Methods
NIOSH 1501;
OSHA 7
See: NMAM or OSHA Methods
Physical Description
Colorless liquid with a distinct aromatic odor, somewhat like gasoline.
Molecular Weight
148.3
Boiling Point
379°F
Freezing Point
-62°F
Solubility
Insoluble
Vapor Pressure
(77°F): 0.7 mmHg
Ionization Potential
8.28 eV
Specific Gravity
0.86
Flash Point
155°F
Upper Exposive Limit
?
Lower Explosive Limit
?
Class IIIA Combustible Liquid: Fl.P. at or above 140°F and below 200°F.
Incompatibilities & Reactivities
Oxidizers
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin; dry nose, throat; headache; low blood pressure, tachycardia, abnormal cardiovascular system stress; central nervous system, hematopoietic depression; metallic taste; liver, kidney injury
Target Organs
Eyes, skin, respiratory system, cardiovascular system, central nervous system, bone marrow, liver, kidneys
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet or contaminated
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 100 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: 1068   MEDICAL TESTS: 0034

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