Dicyclopentadiene

CAS Number
77-73-6
EC Number
201-052-9
Chemical Formula
C10H12
Molecular Weight
132.20 g/mol
Abbreviation
DCPD

Description

Dicyclopentadiene (CAS 77-73-6) is a cyclic diene monomer derived from the dimerization of cyclopentadiene. It serves as a reactive building block in resin and polymer synthesis across several industrial sectors. In unsaturated polyester resins, DCPD is incorporated to reduce styrene content, improve surface quality, and lower resin cost. This makes it a standard raw material for fiberglass composites used in automotive and construction panels.

Hydrocarbon resin manufacturers use DCPD as a primary feedstock to produce C5/C9 resins applied in hot-melt adhesives, road-marking paints, and printing inks. These resins provide excellent tack and stability. In the coatings and ink industry, DCPD-based resins contribute to fast-drying, high-gloss formulations for publication and packaging printing. It also functions as a monomer in ring-opening metathesis polymerization.

This process produces polydicyclopentadiene, a high-impact engineering material used in structural and industrial molded parts. The material is valued for its durability and resistance to chemical degradation. DCPD is supplied as a liquid or solid depending on purity grade, with high-purity grades typically 95% and 99% available for polymer and specialty resin applications. Technical-grade material is standard for large-volume use.

It is commonly traded in bulk quantities, with drum and ISO tank packaging available for industrial buyers. Our supply chain ensures consistent quality and reliable delivery for all manufacturing requirements.

Other Names (Synonyms)

DCPD|3a,4,7,7a-tetrahydro-4,7-methanoindene|Cyclopentadiene dimer|Dimer cyklopentadienu|4,7-Methano-1H-indene, 3a,4,7,7a-tetrahydro-|Prometa XP 100|4,7-Methanoindene, 3a,4,7,7a-tetrahydro-|3a,4,7,7a-Tetrahydro-4,7-methano-1H-indene

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

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Physical Properties

Melting Point 32 °C
Boiling Point 64-65 °C @ Press: 14 Torr
Density 0.9302 g/cm³ @ Temp: 35 °C
Flash Point 114 °F
Appearance Cyclopentadiene is a crystalline solid or a liquid (above 32°C) with a disagreeable, camphor-like odor. The Odor Threshold is 0.011 (detectable); 0.020 ppm (recognizable).
Color Clear
Odor Camphor-like.
Form Liquid
Water Solubility Immiscible with water.
Vapor Pressure 3 hPa (20 °C)
Refractive Index n 20/D 1.511
Log P 3.300 (est)

Documentation

Safety & Handling Learn More

Danger
GHS02· Flammable GHS07· Irritant GHS09· Environmental Hazard GHS06· Toxic GHS08· Health Hazard

Hazard Statements

H225 Highly Flammable liquid and vapor
H226 Flammable liquid and vapor
H228 Flammable solid
H302 Harmful if swallowed

Precautionary Statements

P203 Obtain, consult and follow expert instructions for use.
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233 Keep container tightly closed.
P240 Ground and bond container and receiving equipment.

Trade & Regulatory

HS Code 29021990
UN Number 2048
ADR Class 3
Packing Group III
Storage Class 3 - Flammable liquids
WGK (Germany) 3
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