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CAS RN: 77-73-6 | Product Number: D0443

Dicyclopentadiene (stabilized with BHT) [precursor to Cyclopentadiene]

Purity: >97.0%(GC)
Chemical Substance Law (ENCS):   4-634 |Priority Assessment Chemical Substance
  • 3a,4,7,7a-Tetrahydro-4,7-methano-1H-indene (stabilized with BHT)
  • Tricyclo[,6]deca-3,8-diene (stabilized with BHT)
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Product Number D0443
Purity / Analysis Method >97.0%(GC)
Molecular Formula / Molecular Weight C__1__0H__1__2 = 132.21 
Physical State (20 deg.C) Solid
CAS RN 77-73-6
Related CAS RN 542-92-7
Reaxys Registry Number 1904092
PubChem Substance ID 87567119
SDBS (AIST Spectral DB) 4392
MDL Number


Appearance White or Colorless to Almost white or Almost colorless powder to lump to clear liquid
Purity(GC) min. 97.0 %
Properties (reference)
Melting Point 32 °C
Boiling Point 167 °C
Flash point 44 °C
Refractive Index 1.51
Solubility in water Insoluble
Degree of solubility in water 40 mg/l  
Solubility (soluble in) Alcohol,Toluene,Ether,Acetone,dichloromethane
Pictogram Pictogram Pictogram Pictogram Pictogram
Signal Word Danger
Hazard Statements H330 : Fatal if inhaled.
H302 : Harmful if swallowed.
H315 + H320 : Causes skin and eye irritation.
H361 : Suspected of damaging fertility or the unborn child.
H370 : Causes damage to organs.
H372 : Causes damage to organs through prolonged or repeated exposure.
H373 : May cause damage to organs through prolonged or repeated exposure.
H335 : May cause respiratory irritation.
H304 : May be fatal if swallowed and enters airways.
H411 : Toxic to aquatic life with long lasting effects.
H228 : Flammable solid.
Precautionary Statements P501 : Dispose of contents/ container to an approved waste disposal plant.
P273 : Avoid release to the environment.
P260 : Do not breathe dust/ fume/ gas/ mist/ vapors/ spray.
P270 : Do not eat, drink or smoke when using this product.
P202 : Do not handle until all safety precautions have been read and understood.
P240 : Ground/bond container and receiving equipment.
P210 : Keep away from heat/sparks/open flames/hot surfaces. No smoking.
P201 : Obtain special instructions before use.
P241 : Use explosion-proof electrical/ ventilating/ lighting/ equipment.
P271 : Use only outdoors or in a well-ventilated area.
P264 : Wash skin thoroughly after handling.
P280 : Wear protective gloves/ protective clothing/ eye protection/ face protection.
P284 : Wear respiratory protection.
P302 + P352 : IF ON SKIN: Wash with plenty of water.
P370 + P378 : In case of fire: Use dry sand, dry chemical or alcohol-resistant foam to extinguish.
P391 : Collect spillage.
P331 : Do NOT induce vomiting.
P337 + P313 : If eye irritation persists: Get medical advice/ attention.
P305 + P351 + P338 : IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P308 + P311 : IF exposed or concerned: Call a POISON CENTER/doctor.
P362 + P364 : Take off contaminated clothing and wash it before reuse.
P332 + P313 : If skin irritation occurs: Get medical advice/ attention.
P301 + P310 : IF SWALLOWED: Immediately call a POISON CENTER/doctor.
P304 + P340 + P310 : IF INHALED: Remove person to fresh air and keep comfortable for breathing. Immediately call a POISON CENTER/doctor.
P403 + P233 : Store in a well-ventilated place. Keep container tightly closed.
P405 : Store locked up.
Related Laws:
Chemical Substance Law (ENCS) 4-634
Priority Assessment Chemical Substance
PRTR Law (New Specific Chemical) Class 1 Designated Chemical Substances
Fire Defense Law Group-4-2-III
RTECS# PC1050000
Transport Information:
UN Number UN2048
Class 3
Packing Group III
Precursor to Cyclopentadiene

Typical Procedure:The reaction apparatus is assembled by attaching a thermometer, Vigreaux distilling column and Liebig condenser to a 500 mL two necked flask. The receiver is cooled by means of refrigerants or freezing mixtures. Dicyclopentadiene (195 g) is placed in the two necked flask and heated to about 160 ℃ with an electric heating mantle or oil bath. Thermal decomposition begins at about 150 ℃ and distillates at 38~46 ℃ can be obtained (addition of iron powder expedites the thermal decomposition rate of cyclopentadiene). Heating is applied slowly, because rapid temperature increases cause dicyclopentadiene to distill prior to undergoing thermal decomposition. In such a case, re-distillation allows narrow boiling-point distillates. Cyclopentadiene dimerzes rapidly at room temperature and should be used immediately.


  • Org. Synth. 1963, coll. Vol. 4, 238.
  • Org. Synth. 1962, 42, 50.

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