5-ethylidene-2-norbornene

Modify Date: 2026-07-16 11:56:37

5-ethylidene-2-norbornene structure	Common Name	5-ethylidene-2-norbornene
	CAS Number	16219-75-3	Molecular Weight	120.19200
	Density	0.893 g/mL at 25 °C(lit.)	Boiling Point	146 °C(lit.)
	Molecular Formula	C₉H₁₂	Melting Point	-80 °C
	MSDS	Chinese USA	Flash Point	101 °F
	Symbol	GHS02, GHS07, GHS08, GHS09	Signal Word	Danger

Summary: 5-ethylidene-2-norbornene, also known as 5-亚乙基-2-降冰片烯, CAS number 16219-75-3, with molecular formula C9H12 and molecular weight 120.19200, is a transparent colorless to yellow liquid. This compound can be used as a third monomer to copolymerize with ethylene and propylene to produce EPDM rubber, which has fast vulcanization speed, ozone resistance, chemical resistance (solvents, acids, bases, etc.), electrical discharge resistance, and water vapor resistance. It is suitable for use in rubber products around engines, waterproof boards, building materials, and impact-resistant plastics. For research-use only, not for medical or clinical usage.

This table lists Chinese names, IUPAC names and various aliases of this chemical substance.

Name	5-ethylidene-2-norbornene
Synonym	More Synonyms

This table shows physicochemical parameters including melting point, boiling point, density, solubility and optical rotation. Missing data is marked as N/A.

Density	0.893 g/mL at 25 °C(lit.)
Boiling Point	146 °C(lit.)
Melting Point	-80 °C
Molecular Formula	C₉H₁₂
Molecular Weight	120.19200
Flash Point	101 °F
Exact Mass	120.09400
LogP	2.52870
Vapour density	4.1 (vs air)
Vapour Pressure	5.98mmHg at 25°C
Index of Refraction	n20/D 1.49(lit.)
InChIKey	OJOWICOBYCXEKR-WAPJZHGLSA-N
SMILES	CC=C1CC2C=CC1C2
Storage condition	Flammables area

This table provides MSDS information including hazard classification, first‑aid, fire‑fighting, spill handling, operation and storage instructions.

5-ethylidene-2-norbornene MSDS(Chinese)

This table summarizes toxicological test data, acute & chronic toxicity and ecological hazard parameters for this chemical.

CHEMICAL IDENTIFICATION

RTECS NUMBER :: RB9450000

CHEMICAL NAME :: 2-Norbornene, 5-ethylidene-

CAS REGISTRY NUMBER :: 16219-75-3

LAST UPDATED :: 199712

DATA ITEMS CITED :: 28

MOLECULAR FORMULA :: C9-H12

MOLECULAR WEIGHT :: 120.21

WISWESSER LINE NOTATION :: L55 A CY FUTJ CU2

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: Open irritation test

ROUTE OF EXPOSURE :: Administration onto the skin

SPECIES OBSERVED :: Rodent - rabbit

REFERENCE :: UCDS** Union Carbide Data Sheet. (Union Carbide Corp., 39 Old Ridgebury Rd., Danbury, CT 06817) Volume(issue)/page/year: 11/28/1967 ** ACUTE TOXICITY DATA **

TYPE OF TEST :: TCLo - Lowest published toxic concentration

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Human

DOSE/DURATION :: 6 ppm/30M

TOXIC EFFECTS :: Sense Organs and Special Senses (Olfaction) - effect, not otherwise specified Sense Organs and Special Senses (Eye) - conjunctive irritation Sense Organs and Special Senses (Taste) - change in function

REFERENCE :: TXAPA9 Toxicology and Applied Pharmacology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1959- Volume(issue)/page/year: 20,250,1971

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 2830 uL/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: AIHAAP American Industrial Hygiene Association Journal. (AIHA, 475 Wolf Ledges Pkwy., Akron, OH 44311) V.19- 1958- Volume(issue)/page/year: 30,470,1969

TYPE OF TEST :: LC50 - Lethal concentration, 50 percent kill

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 1246 ppm/4H

TOXIC EFFECTS :: Behavioral - muscle weakness

REFERENCE :: TXAPA9 Toxicology and Applied Pharmacology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1959- Volume(issue)/page/year: 20,250,1971

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 2830 uL/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: NTIS** National Technical Information Service. (Springfield, VA 22161) Formerly U.S. Clearinghouse for Scientific & Technical Information. Volume(issue)/page/year: OTS0536403

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 3250 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 18(10),52,1974

TYPE OF TEST :: LC50 - Lethal concentration, 50 percent kill

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 732 ppm/4H

TOXIC EFFECTS :: Behavioral - muscle weakness

REFERENCE :: TXAPA9 Toxicology and Applied Pharmacology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1959- Volume(issue)/page/year: 20,250,1971

TYPE OF TEST :: LC50 - Lethal concentration, 50 percent kill

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - rabbit

DOSE/DURATION :: 3104 ppm/4H

TOXIC EFFECTS :: Sense Organs and Special Senses (Olfaction) - ulcerated nasal septum

REFERENCE :: TXAPA9 Toxicology and Applied Pharmacology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1959- Volume(issue)/page/year: 20,250,1971

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Administration onto the skin

SPECIES OBSERVED :: Rodent - rabbit

DOSE/DURATION :: 9170 uL/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: AIHAAP American Industrial Hygiene Association Journal. (AIHA, 475 Wolf Ledges Pkwy., Akron, OH 44311) V.19- 1958- Volume(issue)/page/year: 30,470,1969

TYPE OF TEST :: LC50 - Lethal concentration, 50 percent kill

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - guinea pig

DOSE/DURATION :: 2896 ppm/4H

TOXIC EFFECTS :: Sense Organs and Special Senses (Eye) - lacrimation Behavioral - convulsions or effect on seizure threshold

REFERENCE :: TXAPA9 Toxicology and Applied Pharmacology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1959- Volume(issue)/page/year: 20,250,1971 ** OTHER MULTIPLE DOSE TOXICITY DATA **

TYPE OF TEST :: TCLo - Lowest published toxic concentration

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 90 ppm/7H/88D-I

TOXIC EFFECTS :: Liver - changes in liver weight Kidney, Ureter, Bladder - changes in tubules (including acute renal failure, acute tubular necrosis) Nutritional and Gross Metabolic - weight loss or decreased weight gain

REFERENCE :: TXAPA9 Toxicology and Applied Pharmacology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1959- Volume(issue)/page/year: 20,250,1971

TYPE OF TEST :: TCLo - Lowest published toxic concentration

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 350 ppm/6H/11D-I

TOXIC EFFECTS :: Endocrine - changes in thyroid weight Blood - changes in erythrocyte (RBC) count Nutritional and Gross Metabolic - weight loss or decreased weight gain

REFERENCE :: NTIS** National Technical Information Service. (Springfield, VA 22161) Formerly U.S. Clearinghouse for Scientific & Technical Information. Volume(issue)/page/year: OTS0536403

TYPE OF TEST :: TCLo - Lowest published toxic concentration

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Mammal - dog

DOSE/DURATION :: 61 ppm/7H/89D-I

TOXIC EFFECTS :: Liver - other changes Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - other transferases

REFERENCE :: NTIS** National Technical Information Service. (Springfield, VA 22161) Formerly U.S. Clearinghouse for Scientific & Technical Information. Volume(issue)/page/year: OTS0536403 ** REPRODUCTIVE DATA **

TYPE OF TEST :: TCLo - Lowest published toxic concentration

ROUTE OF EXPOSURE :: Inhalation

DOSE :: 100 ppm/6H

SEX/DURATION :: female 6-15 day(s) after conception

REFERENCE :: IOMTE3 International Journal of Occupational Medicine and Toxicology. (Princeton Scientific Publishing, POB 2155, Princeton, NJ 08543) V.3(2)- 4(4), 1994-95 Volume(issue)/page/year: 4,371,1995 *** REVIEWS *** ACGIH TLV-CL 25 mg/m3 (5 ppm) DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: TLV/BEI,1997 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-AUSTRALIA:TWA 5 ppm (25 mg/m3) JAN 1993 OEL-BELGIUM:STEL 5 ppm (25 mg/m3) JAN 1993 OEL-DENMARK:STEL 5 ppm (25 mg/m3) JAN 1993 OEL-FINLAND:TWA 5 ppm (25 mg/m3);STEL 10 ppm (50 mg/m3) JAN 1993 OEL-FRANCE:STEL 5 ppm (25 mg/m3) JAN 1993 OEL-THE NETHERLANDS:TWA 5 ppm (25 mg/m3) JAN 1993 OEL-SWITZERLAND:TWA 5 ppm (25 mg/m3) JAN 1993 OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGIH TLV *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH RECOMMENDED EXPOSURE LEVEL (REL) : NIOSH REL TO ETHYLIDENE NORBORNENE-air:CL 5 ppm REFERENCE : NIOSH* National Institute for Occupational Safety and Health, U.S. Dept. of Health, Education, and Welfare, Reports and Memoranda. Volume(issue)/page/year: DHHS #92-100,1992 NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - M3889 No. of Facilities: 22 (estimated) No. of Industries: 1 No. of Occupations: 20 No. of Employees: 1988 (estimated)

This table covers safety warnings, protective measures, incompatible substances and disposal guidelines for this compound.

Symbol	GHS02, GHS07, GHS08, GHS09
Signal Word	Danger
Hazard Statements	H226-H304-H315-H332-H373-H411
Precautionary Statements	P273-P301 + P310-P331
Target Organs	Liver, Testes
Personal Protective Equipment	Eyeshields;Faceshields;full-face respirator (US);Gloves;multi-purpose combination respirator cartridge (US);type ABEK (EN14387) respirator filter
Hazard Codes	Xn
Risk Phrases	R10
Safety Phrases	S16-S26-S36/37/39
RIDADR	UN 2929 6.1/PG 2
WGK Germany	2
RTECS	RB9450000
Packaging Group	III
Hazard Class	3
HS Code	2902199090

This table lists upstream starting materials and downstream derivative products related to this chemical.

Precursor 0
DownStream 4
CAS#:2146-40-9 3-ethylidenebic... CAS#:22482-71-9 1-(2,3,4,5,6,7-... CAS#:2146-41-0 5-Ethylnorbornane CAS#:31996-78-8 herbal heptane

This table shows customs‑related data including HS‑code, tariff and regulatory conditions for import and export.

HS Code	2902199090
Summary	2902199090 other cyclanes, cyclenes and cyclotherpenes。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:2.0%。General tariff:30.0%

This table lists relevant public references with title, journal and publication metadata for this compound.

Comparative acute toxicity and primary irritancy of the ethylidene and vinyl isomers of norbornene.

J. Appl. Toxicol. 17(4) , 211-21, (1997)

The acute toxicity and primary irritancy of the industrial chemicals 5-ethylidene-2-norbornene (ENB) and 5-vinyl-2-norbornene (VNB) were studied. They are of moderate acute peroral toxicity in the rat...

Short-term and subchronic repeated exposure studies with 5-ethylidene-2-norbornene vapor in the rat.

J. Appl. Toxicol. 17(4) , 197-210, (1997)

5-Ethylidene-2-norbornene (ENB) is an industrial chemical whose physical properties indicate a likelihood for vapor exposure to humans. The potential for target organ or cumulative toxicity was invest...

Environmental assessment of 5-ethylidene-2-norbornene using modeled and measured fate and effects results.

Chemosphere 56(3) , 285-97, (2004)

Several predictive models were used to assess aquatic exposure, persistence (P) and potential for long-range transport (LRT) of 5-ethylidene-2-norbornene (ENB). Such estimations are components of the ...

This table collects all English aliases, systematic names and CAS‑related synonyms of the compound.

5-ethylidenenorborn-2-ene

5-ETHYLENE-2-NORBORENE

2-ethylidenenorbornene

EINECS 240-347-7

5-Ethylidene-2-norbornene

2-ethylidenebicyclo<2.2.1>hept-5-ene

5-Ethylidene-2-norbornene,mixt. of endo- and exo-isomers,stabilized

Ethylidene Norbornene

MFCD00167576

5-Ethylidene-2-norbornen

5-Ethylidenebicyclo[2.2.1]hept-2-ene

ETHYLIDENE-2-NORBORNENE

5-ethylidene-norbornene

5-ethylidene-5-norbornene

ethylidenenorbornene

enb

This section contains frequently‑asked‑questions about this compound, including basic parameters, properties, storage conditions and corresponding answers.

Q: What are the storage conditions for 5-ethylidene-2-norbornene?

A: Storage conditions for 5-ethylidene-2-norbornene: Flammables area.

Q: What are the downstream products of 5-ethylidene-2-norbornene?

A: Related downstream products(CAS) of 5-ethylidene-2-norbornene: 2146-40-9;22482-71-9;2146-41-0;31996-78-8.

Q: What is the InChIKey of 5-ethylidene-2-norbornene?

A: InChIKey of 5-ethylidene-2-norbornene is OJOWICOBYCXEKR-WAPJZHGLSA-N.

Q: What is the boiling point of 5-ethylidene-2-norbornene?

A: Boiling point of 5-ethylidene-2-norbornene is 146 °C(lit.).

Q: What is the molecular weight of 5-ethylidene-2-norbornene?

A: Molecular weight of 5-ethylidene-2-norbornene is 120.19200.

Q: What is the melting point of 5-ethylidene-2-norbornene?

A: Melting point of 5-ethylidene-2-norbornene is -80 °C.

Q: What is the molecular formula of 5-ethylidene-2-norbornene?

A: Molecular formula of 5-ethylidene-2-norbornene is C9H12.

Q: What is the CAS number of 5-ethylidene-2-norbornene?

A: CAS number of 5-ethylidene-2-norbornene is 16219-75-3.

Q: What is the safety information for 5-ethylidene-2-norbornene?

A: Safety information for 5-ethylidene-2-norbornene: S16-S26-S36/37/39.

Q: What is the English name of 5-ethylidene-2-norbornene?

A: The English name of 5-ethylidene-2-norbornene is 5-ethylidene-2-norbornene.

This table lists manufacturers and suppliers of this compound, including vendor names and product supply reference information.

Shanghai Nianxing Industrial Co., Ltd

Dayang Chem (Hangzhou) Co., Ltd.

The content on this webpage is sourced from various professional data sources. If you have any questions or concerns regarding the content, please feel free to contact service1@chemsrc.com.

Shanghai Nianxing Industrial Co., Ltd
China
Product Name: 5-ethylidene-2-norbornene
Price: Check
Purity: 98.0%
Delivery: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 5-Ethylidene-2-norbornene
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Delivery: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

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5-ethylidene-2-norbornene

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5-ethylidene-2-norbornene | FAQ

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The content on this webpage is sourced from various professional data sources. If you have any questions or concerns regarding the content, please feel free to contact service1@chemsrc.com.