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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Environmental fate & pathways

Henry's Law constant

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Description of key information

The calculation of the Henry's Law Constant for C.I. Direct Blue 264 using the ratio of vapour pressure to water solubility revealed a value of 7.9E-31 Pa m3/mol. 

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
at the temperature of:
25 °C

Additional information

The Henry's Law Constant (HLC) of C.I. Direct Blue 264 was estimated to be 7.9E-31 Pa m3/mol at 25°C.

This value is below the lowermost key value foreseen/accepted in IUCLID. Therefore the lowermost foreseen/accepted value (1E-09 Pa m3/mol) was entered as key value and used for further assessment.