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p-tert-Butyltoluene																				Related Pages
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 ppmSee: 98511

Exposure Limits
			NIOSH RELTWA 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 Weight148.3	
	Boiling Point379°F
	Freezing Point-62°F
	SolubilityInsoluble
	Vapor Pressure(77°F): 0.7 mmHg
	Ionization Potential8.28 eV											
Specific Gravity0.86	
	Flash Point155°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 canisterAny appropriate escape-type, self-contained breathing apparatus
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 1068
					  MEDICAL TESTS: 0034

			
							

			Page last reviewed:  October 30, 2019						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Pocket Guide to Chemical Hazards
Introduction
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Appendices
A – NIOSH Potential Occupational Carcinogens
B – Thirteen OSHA-Regulated Carcinogens
C – Supplementary Exposure Limits
D – Substances with No Established RELs
E – OSHA Respirator Requirements for Selected Chemicals
F – Miscellaneous Notes
G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect
Type C & CE – Definitions for Type C and Type CE Respirators
Personal Protection and Sanitation Codes
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