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Benzene																				Related Pages
Synonyms & Trade Names
			Benzol, Phenyl hydride
CAS No.
			71-43-2
	RTECS No.
			CY1400000
	DOT ID & Guide
			1114 130

FormulaC6H6
	Conversion
			1 ppm = 3.19 mg/m3
	IDLH
			Ca [500 ppm]See: 71432

Exposure Limits
			NIOSH RELCa TWA 0.1 ppm ST 1 ppm See Appendix A
					OSHA PEL [1910.1028] TWA 1 ppm ST 5 ppm See Appendix F
	Measurement Methods
			**NIOSH** 1500 , 1501 , 3700 , 3800;**OSHA** 1005 , 5000
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless to light-yellow liquid with an aromatic odor.
					[Note: A solid below 42°F.]													
										
Molecular Weight78.1	
	Boiling Point176°F
	Freezing Point42°F
	Solubility0.07%
	Vapor Pressure75 mmHg
	Ionization Potential9.24 eV											
Specific Gravity0.88	
	Flash Point12°F
	Upper Explosive Limit7.8%
	Lower Explosive Limit1.2%
Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities
			Strong oxidizers, many fluorides & perchlorates, nitric acid
Exposure Routes
			inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
			irritation eyes, skin, nose, respiratory system; dizziness; headache, nausea, staggered gait; anorexia, lassitude (weakness, exhaustion); dermatitis; bone marrow depression; [potential occupational carcinogen]
Target Organs
			Eyes, skin, respiratory system, blood, central nervous system, bone marrow
Cancer Site[leukemia]										
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
							**Provide:**Eyewash, Quick drench
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Soap wash immediately
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			(See Appendix E)**NIOSH****At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:** (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: 0015
					  MEDICAL TESTS: 0022

			
							

			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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Chemical Names, Synonyms and Trade Names
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CAS Numbers
RTECS Numbers
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
First Aid Procedures Follow NIOSH Facebook
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