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Ethylidene norbornene																				Related Pages
Synonyms & Trade Names
			ENB, 5-Ethylidenebicyclo(2.2.1)hept-2-ene, 5-Ethylidene-2-norbornene
					[Note: Due to its reactivity, ENB may be stabilized with tert-butyl catechol.]
CAS No.
			16219-75-3
	RTECS No.
			RB9450000
	DOT ID & Guide

FormulaC9H12
	Conversion
			1 ppm = 4.92 mg/m3
	IDLH
			N.D.See: IDLH INDEX

Exposure Limits
			NIOSH RELC 5 ppm (25 mg/m3)
					OSHA PEL none See Appendix G
	Measurement Methods
			None available 
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless to white liquid with a turpentine-like odor.													
										
Molecular Weight120.2	
	Boiling Point298°F
	Freezing Point-112°F
	Solubility?
	Vapor Pressure4 mmHg
	Ionization Potential?											
Specific Gravity0.90	
	Flash Point(oc) 101°F
	Upper Explosive Limit?
	Lower Explosive Limit?
Class II Combustible Liquid: Fl.P. at or above 100°F and below 140°F.
Incompatibilities & Reactivities
			Oxygen
					[Note: ENB should be stored in a nitrogen atmosphere since it reacts with oxygen.]
Exposure Routes
			inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
			irritation eyes, skin, nose, throat; headache; cough, dyspnea (breathing difficulty); nausea, vomiting; olfactory, taste changes; chemical pneumonitis (aspiration liquid); In Animals: liver, kidney, urogenital injury; bone marrow effects
Target Organs
			Eyes, skin, respiratory system, central nervous system, liver, kidneys, urogenital system, bone marrow
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**Prevent skin contact
							**Eyes:**Prevent eye contact
							**Wash skin:**Daily
							**Remove:**When wet or contaminated
							**Change:**No recommendation
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Soap wash immediately
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			Not available.
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 0473

			
							

			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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