NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

Ethylidene norbornene

CAS
16219-75-3

C9H12

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

Exposure
Limits

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
Respirator Recommendations
Not available.
Important additional information about respirator selection
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