| Agent Name |
Ethylidene norbornene |
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| CAS Number |
16219-75-3 |
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| Formula |
C9-H12 |
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| Major Category |
Plastics & Rubber |
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| Synonyms |
2-Norbornene, 5-ethylidene-; 5-Ethylidene-2-norbornene; 5-Ethylidenebicyclo(2.2.1)hept-2-ene; ENB; Ethylidenenorbornene; [ChemIDplus] UN1992 |
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| Category |
Other Monomers |
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| Description |
Colorless to white liquid with a turpentine-like odor; [NIOSH] |
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| Sources/Uses |
Used as the third monomer, the diene, in EPDM (ethylene-propylene diene monomer); EPDM is used to make the elastomer, ethylene-propylene terpolymer; [Hawley] |
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| Comments |
Subchronic animal studies: liver enlargement and liver lesions; [ACGIH] A skin, eye, and respiratory tract irritant; May have liver and kidney effects; [ICSC] Vapor is irritating; If inhaled will cause coughing, headache, and confusion; Will cause reddening of skin if contaminated clothing not removed; [CHRIS] |
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| Exposure Assessment |
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| Skin Designation (ACGIH) |
No |
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| Ceiling (ACGIH) |
5 ppm |
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| Vapor Pressure |
4 mm Hg |
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| Odor Threshold Low |
0.07 ppm |
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| Lethal Concentration |
LC50 (rats) = 1,246 ppm/4h |
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| Explanatory Notes |
Flash point = 38 deg C; Odor threshold (detection or recognition not specified), from CHEMINFO; |
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| Adverse Effects |
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| Dermatotoxin |
Skin Burns |
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| Neurotoxin |
CNS Solvent Syndrome |
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| Hepatotoxin |
Hepatotoxin, Secondary |
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| Links to Other NLM Databases |
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| Health Studies |
Human Health Effects from Hazardous Substances Data Bank: 5-ETHYLIDENE-2-NORBORNENE
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