Dicyclopentadiene CAS No. 77-73-6

Dicyclopentadiene (DCPD) 

CAS No.: 77-73-6 | EC No.: 201-052-9

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1. Chemical Identification

Property	Specification
IUPAC Name	3a,4,7,7a-Tetrahydro-4,7-methanoindene
Molecular Formula	C₁₀H₁₂
Molecular Weight	132.20 g/mol
Appearance	Clear colorless to pale yellow liquid
Density	0.986 g/mL at 25°C
Melting Point	33°C
Boiling Point	170-172°C
Refractive Index	n<sup>20</sup><sub>D</sub> 1.511
Flash Point	32°C (closed cup)

Synonyms:
DCPD, Cyclopentadiene dimer, 4,7-Methanoindene

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2. Key Applications

Polymer Industry

Synthetic Resins: Production of unsaturated polyester resinsPetroleum Resins: Self-polymerization for various resin gradesEPDM Rubbers: Key monomer for synthetic elastomers

Agrochemicals

Insecticide Intermediate: Dicyclopentadiene chloride synthesisHerbicide Production: Precursor for chloromethylpyridine derivatives

Specialty Chemicals

Metallocene Synthesis: Catalyst component for polyolefinsFlame Retardants: Building block for halogen-free formulationsEpoxy Curing Agents: High-performance crosslinkers

Advanced Materials

Rocket Propellants: High-energy fuel componentFragrance Chemistry: Intermediate for woody amber notes

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3. Product Advantages

✔ Thermal Stability – Withstands high-temperature processes
✔ Reactive Diene – Enables diverse polymerization reactions
✔ Multi-industry Utility – Single source for cross-sector applications

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4. Physical & Chemical Properties

Viscosity: 10-15 cP at 25°CHeat of Combustion: 41.5 MJ/kgPolymerization: Forms homopolymers above 150°C

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5. Handling & Storage

Parameter	Requirement
Storage Temp	<25°C (cool, well-ventilated)
Stabilizer	BHT (100-200 ppm typical)
Packaging	200kg steel drums/IBCs
Shelf Life	12 months stabilized

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6. Safety Information

Warning!

H226: Flammable liquid/vaporH304: May be fatal if swallowed/enters airwaysH315+H319: Skin/eye irritation

Protective Measures:

P210: Keep away from heat/sparks/open flamesP331: Do NOT induce vomiting if swallowedP405: Store locked up

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7. Quality Specifications

Purity: ≥95% (GC)Monomer Content: ≤3% cyclopentadieneStabilizer Content: 100-200 ppm BHT

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Disclaimer:
This technical information is for qualified professionals only. Users must comply with local regulations for flammable chemicals and obtain proper handling training.

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