Registration Dossier
Registration Dossier
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EC number: 273-309-3 | CAS number: 68956-56-9
Water solubility
Administrative data
Link to relevant study record(s)
Description of key information
The water solubility of alpha pinene (2.75 mg/L at 20°C) being the lowest water solubity of the main constituents of the substance, this value was retained for the chemical safety assessment of the substance.
Key value for chemical safety assessment
- Water solubility:
- 2.75 mg/L
- at the temperature of:
- 20 °C
Additional information
In a weight of evidence approach, literature data and experimental values were gathered for the main constituents of the substance. For dipentene and alpha pinene, a read-across approach was used, with d-limonene and (-)-alpha pinene respectively. When several values were available for one constituent, the arithmetic mean value was calculated.
In this way the following water solubilities were determined for the main constituents of Hydrocarbons, terpene processing by-products :
- terpinolene : Ws = 5.79 mg/L at 20°C
- alpha pinene (read across with (-)-alpha pinene) : Ws = 2.75 mg/L at 20°C
- dipentene (read across with d-limonene) : Ws = 4.84 mg/L at 20°C
- camphene : Ws = 4.2 mg/L at 20°C
- gamma terpinene : Ws = 8.68 mg/L.
Therefore, the main constituents of the substance have a water solubilty in the range 2.75 - 8.68 mg/L. The lower limit of this range was considered as the relevant key value for the chemical safety assessement.
Thus the water solubility of alpha pinene (2.75 mg/L at 20°C) was retained for the chemical safety assessment.
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