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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

Overview of physico-chemical properties of penta-1,3-diene





Physical state at 20°C and 101.3 kPa

Colourless liquid substance


Melting / freezing point

 -141 deg C (cis)

 -87 deg C (trans)


Boiling point:

42 deg C


Relative density:

0.68 g/cm3

relative density at 20 deg C

Vapour pressure:

412 mm Hg

54.9 kPa

at 25 °C

Surface tension:



Water solubility:

690 mg/L

at 25 °C

Partition coefficient n-octanol/water (log value):


log Kow/ log Pow (calculated)

Flash point:

-53deg C



Category 2

Flammable Liquid


Explosive properties:

Not Explosive

Contains no groups associated with explosive properties

Self-ignition temperature:

359 deg C


Oxidising properties:

Not oxidizing



Not applicable

Liquid substance

Henry’s law constant (HLC):

6.99 -12.4 kPa-m3/mole

at 25 deg C (estimated)

Solubility in organic solvents:

Soluble in Alcohol, Ether, Acetone, Benzene, Carbon tetrachloride