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Basic Information
CAS No.: 26519-91-5
Name: Methylcyclopentadiene
Molecular Structure:
Molecular Structure of 26519-91-5 (Methylcyclopentadiene)
Formula: C6H8
Molecular Weight: 80.13
Synonyms: Cyclopentadiene,methyl- (6CI,7CI); Methyl-1,3-cyclopentadiene; Methylcyclopentadiene;Monomethylcyclopentadiene
EINECS: 247-757-5
Density: 0.941（4℃/20℃）
Melting Point: -51℃
Boiling Point: 85.8°Cat760mmHg
Flash Point: 26℃
Solubility: 易溶于乙醚、乙醇、苯等，不溶于水
Appearance: colourless liquid
PSA: 0.00000
LogP: 1.89260
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Chemistry

The Molecular Structure of 1,3-Cyclopentadiene,methyl- (CAS NO.26519-91-5):

Empirical Formula: C6H8
Molecular Weight: 80.1277 
IUPAC Name: 1-methylcyclopenta-1,3-diene
Nominal Mass: 80 Da
Average Mass: 80.1277 Da
Monoisotopic Mass: 80.0626 Da 
Index of Refraction: 1.489
Molar Refractivity: 26.97 cm3
Molar Volume: 93.2 cm3
Surface Tension: 26.7 dyne/cm
Density: 0.858 g/cm3
Enthalpy of Vaporization: 31.26 kJ/mol
Boiling Point: 85.8 °C at 760 mmHg
Vapour Pressure: 76.4 mmHg at 25°C 
Solubility: insoluble in water
InChI
InChI=1/C6H8/c1-6-4-2-3-5-6/h2-4H,5H2,1H3
Smiles
C1(=CC=CC1)C

Uses

This substance is mainly used for producing raw materials of epoxy resin curing agent A Jinadike anhydride (MNA) and the gasoline antiknock agent methyl cyclopentadienyl manganese tricarbonyl (MMT), also used in the production of polyolefin catalysts, pharmaceuticals, energy fuel , Dye additives, and other new products.

Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 oral 2700mg/kg (2700mg/kg)   Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 46(1), Pg. 94, 1981.

Specification

 1,3-Cyclopentadiene,methyl- (CAS NO.26519-91-5) is also called as Methylcyclopentadiene Methyl-1,3-cyclopentadiene ; Methylcyclopentadiene ; Monomethylcyclopentadiene ; Cyclopentadiene, methyl- (6CI,7CI) ; Methylcyclopenta-1,3-diene .