Skip directly to local search Skip directly to A to Z list Skip directly to navigation Skip directly to site content Skip directly to page options
CDC Home

Enter search terms separated by spaces.

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)
Measurement Methods

NIOSH 1501;
OSHA 7
See: NMAM or OSHA Methods
Physical Description
Colorless liquid with a distinct aromatic odor, somewhat like gasoline.
MW:
148.3
BP:
379°F
FRZ:
-62°F
Sol:
Insoluble
VP(77°F): 0.7 mmHg
IP:
8.28 eV
Sp.Gr:
0.86
Fl.P:
155°F
UEL:
?
LEL:
?
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   See ICSC CARD: 1068   See MEDICAL TESTS: 0034
 
Contact Us:
USA.gov: The U.S. Government's Official Web PortalDepartment of Health and Human Services
Centers for Disease Control and Prevention   1600 Clifton Rd. Atlanta, GA 30333, USA
800-CDC-INFO (800-232-4636) TTY: (888) 232-6348 - Contact CDC–INFO