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Physical & Chemical properties

Vapour pressure

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Description of key information

The vapour pressure of C.I. Direct Blue 264 was predicted using the QSAR calculation of the Estimation Program Interface (EPI) Suite v4.1. The experimental melting point of 167°C and calculated boiling point of 1389.58°C were taken into account for estimation. Using the modified Grain method, the vapour pressure was estimated to be 1.92E-32 Pa at 25°C. The predicted value can be considered reliable yielding a useful result for further assessment.

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
25 °C

Additional information

Using the modified Grain method, the vapour pressure of C.I. Direct Blue 264 was estimated to be 1.92E-32 Pa at 25°C.

This value is below the lowermost key value foreseen/accepted in IUCLID.Therefore the lowermost foreseen/accepted value (1E-09 Pa) was entered as key value and used for further assessment.

 

C.I. Direct Blue 264 is an UVCB substance consisting of phthalocyanine copper complexes. All constituents have copper phthalocyanine as basic structure. They carry further different numbers of two different types of side chains (sulfonic acid and dimethylaminopropyl sulfonamide). All present structures in the mixture were calculated with the program but as the structure carrying two dimethylaminopropyl sulfonamide groups revealed the highest vapour pressure value this constituent of C.I. Direct Blue 264 is taken as a worst case for calculation.