NIOSH Pocket Guide to Chemical Hazards

Ethylidene norbornene

CAS 16219-75-3


RTECS RB9450000
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.]
DOT ID & Guide


NIOSH REL: C 5 ppm (25 mg/m3)
OSHA PEL: none
IDLH N.D. See: IDLH INDEX Conversion 1 ppm = 4.92 mg/m3
Physical Description
Colorless to white liquid with a turpentine-like odor.
MW: 120.2
BP: 298°F
FRZ: -112°F
Sol: ?
VP: 4 mmHg
IP: ?

Sp.Gr: 0.90
Fl.P(oc): 101°F
UEL: ?
LEL: ?

Class II Combustible Liquid: Fl.P. at or above 100F and below 140F.
Incompatibilities & Reactivities
Oxygen [Note: ENB should be stored in a nitrogen atmosphere since it reacts with oxygen.]
Measurement Methods
None available
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
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
Important additional information about respirator selection
Respirator Recommendations Not available.
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
See also: INTRODUCTION   See ICSC CARD: 0473