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 Explosive 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

p-tert-Butyltoluene

NIOSH REL

OSHA PEL

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