Cyclopentadiene

Modify Date: 2024-01-02 11:48:34

Cyclopentadiene Structure
Cyclopentadiene structure
Common Name Cyclopentadiene
CAS Number 542-92-7 Molecular Weight 66.101
Density 0.9±0.1 g/cm3 Boiling Point 41.5±0.0 °C at 760 mmHg
Molecular Formula C5H6 Melting Point -97.2ºC
MSDS N/A Flash Point -32.2±13.0 °C

 Names

Name cyclopentadiene
Synonym More Synonyms

 Chemical & Physical Properties

Density 0.9±0.1 g/cm3
Boiling Point 41.5±0.0 °C at 760 mmHg
Melting Point -97.2ºC
Molecular Formula C5H6
Molecular Weight 66.101
Flash Point -32.2±13.0 °C
Exact Mass 66.046951
LogP 1.79
Vapour Pressure 418.5±0.0 mmHg at 25°C
Index of Refraction 1.503
Stability Stable at room temperature. Incompatible with oxidizing agents, acids and a wide variety of other compounds. May form peroxides in storage. May undergo spontaneous polymerisation. Decomposes on heating. Highly flammable. Mixtures with air are explosive.

 Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
GY1000000
CHEMICAL NAME :
1,3-Cyclopentadiene
CAS REGISTRY NUMBER :
542-92-7
LAST UPDATED :
199712
DATA ITEMS CITED :
31
MOLECULAR FORMULA :
C5-H6
MOLECULAR WEIGHT :
66.11
WISWESSER LINE NOTATION :
L5 AHJ

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
200 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
TPKVAL Toksikologiya Novykh Promyshlennykh Khimicheskikh Veshchestv. Toxicology of New Industrial Chemical Substances. For English translation, see TNICS*. (Izdatel'stvo Meditsina, Moscow, USSR) No.1- 1961- Volume(issue)/page/year: 9,27,1967
TYPE OF TEST :
LC50 - Lethal concentration, 50 percent kill
ROUTE OF EXPOSURE :
Inhalation
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
39 gm/m3
TOXIC EFFECTS :
Behavioral - excitement Behavioral - muscle contraction or spasticity Behavioral - aggression
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: 9(12),13,1965
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
800 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
TPKVAL Toksikologiya Novykh Promyshlennykh Khimicheskikh Veshchestv. Toxicology of New Industrial Chemical Substances. For English translation, see TNICS*. (Izdatel'stvo Meditsina, Moscow, USSR) No.1- 1961- Volume(issue)/page/year: 9,27,1967
TYPE OF TEST :
LC50 - Lethal concentration, 50 percent kill
ROUTE OF EXPOSURE :
Inhalation
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
14 gm/m3
TOXIC EFFECTS :
Behavioral - excitement Behavioral - muscle contraction or spasticity Behavioral - aggression
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: 9(12),13,1965 ** OTHER MULTIPLE DOSE TOXICITY DATA **
TYPE OF TEST :
TCLo - Lowest published toxic concentration
ROUTE OF EXPOSURE :
Inhalation
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
350 mg/m3/4H/26W-I
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: 9(12),13,1965 *** REVIEWS *** ACGIH TLV-TWA 203 mg/m3 (75 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 *** U.S. STANDARDS AND REGULATIONS *** MSHA STANDARD-air:TWA 75 ppm (200 mg/m3) 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: 3,66,1971 OSHA PEL (Gen Indu):8H TWA 75 ppm (200 mg/m3) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1910.1000,1994 OSHA PEL (Construc):8H TWA 75 ppm (200 mg/m3) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1926.55,1994 OSHA PEL (Shipyard):8H TWA 75 ppm (200 mg/m3) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1915.1000,1993 OSHA PEL (Fed Cont):8H TWA 75 ppm (200 mg/m3) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 41,50-204.50,1994 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-AUSTRALIA:TWA 75 ppm (200 mg/m3) JAN 1993 OEL-AUSTRIA:TWA 75 ppm (200 mg/m3) JAN 1993 OEL-BELGIUM:TWA 75 ppm (203 mg/m3) JAN 1993 OEL-DENMARK:TWA 75 ppm (200 mg/m3) JAN 1993 OEL-FINLAND:TWA 75 ppm (200 mg/m3);STEL 115 ppm (310 mg/m3) JAN 1993 OEL-FRANCE:TWA 75 ppm (200 mg/m3) JAN 1993 OEL-GERMANY:TWA 75 ppm (200 mg/m3) JAN 1993 OEL-HUNGARY:TWA 20 mg/m3;STEL 40 mg/m3 JAN 1993 OEL-THE NETHERLANDS:TWA 75 ppm (200 mg/m3) JAN 1993 OEL-THE PHILIPPINES:TWA 75 ppm (200 mg/m3) JAN 1993 OEL-RUSSIA:STEL 5 mg/m3 JAN 1993 OEL-SWITZERLAND:TWA 75 ppm (200 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 CYCLOPENTADIENE-air:10H TWA 75 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 - 20065 No. of Facilities: 3138 (estimated) No. of Industries: 19 No. of Occupations: 26 No. of Employees: 18381 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - 20065 No. of Facilities: 3 (estimated) No. of Industries: 1 No. of Occupations: 3 No. of Employees: 51 (estimated)

 Safety Information

RIDADR UN 1993
Packaging Group III
Hazard Class 3.2

 Synthetic Route

 Synonyms

cyclopentadienalpotassium
1,3-cyclopentadiene
Cyclopenta-1,3-diene
Potassium,2,4-cyclopentadien-1-yl
Cyclopentadienylpotassium
1,3-Cyclopentadiene,potassium complex
cyclopentanediene
cyclopentadienyl
POTASSIUM CYCLOPENTADIENIDE
EINECS 208-835-4
1,3-Cyclopentadiene
cyclopentdiene
EINECS 208-835-4
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