Registration Dossier
Registration Dossier
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EC number: 202-046-9 | CAS number: 91-17-8
Endpoint summary
Administrative data
Description of key information
Additional information
At ambient temperature and pressure decahydronaphthalene is an organic clear colourless liquid with an odour like camphor, menthol, and naphthalene. At thermodynamic equilibrium it is an isomer mixture with approximately 90 % trans isomer and 10 % cis isomer. The commercial product usually has approximately equal shares of the isomers.
Melting point (ca. 1013 hPa): -43 °C (cis), -31 °C (trans), approx. -40 °C (isomer mixture).
Boiling point (1013 hPa): 195 °C (cis), 187 °C (trans), isomer mixture in between.
Density (20 °C): 8965 g/cm3 (cis), 0.8700 g/cm3 (trans), isomer mixture in between [0.8804 g/cm3]
Particle size distribution: not applicable (liquid)
Vapour pressure (20 °C): 1.064 hPa (isomer mixture)
Partition coefficient n-octanol/water: log Kow = 4.20
Water solubility (25 °C): 0.889 mg/l
Surface activity is not a desired property of the substance and is not expected based on structure.
Flash point (1013 hPa): 57 °C (isomer mixture)
Auto flammability (1013 hPa): 255 +/- 5 °C (pure isomers and mixture)
Flammability (solids): not applicable (liquid)
Explosiveness: no (structural considerations)
Oxidising properties: no (structural considerations)
Stability in organic solvents: not critical
Dissociation constant: not relevant
Viscosity (20 °C): 3.4 mPa s (cis) 2.1 mPa s (trans)Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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