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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Dissociation constant

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Administrative data

Link to relevant study record(s)

Description of key information

The test substance is a salt and ionized at all pH values in the logarithm range of 1-14, thus the study on the determination of the dissociation constants in water is waived

Key value for chemical safety assessment

Additional information

The test substance is a sodium salt. The sodium part of the test substance is positively charged at all pH values in the logarithm range of 1-14. The thiocyanate part of the test substance is the conjugate base of thiocyanic acid. The latter is a strong acid and has a log pK, value of <1. It means that the thiocyanate part of the test substance is negatively charged at all pH values in the logarithm range of 1-14. . Since the test substance is salt and ionized at ail pH values in the logarithm range of 1-14, the study on the determination of the dissociation constants in water is not required. This is also supported by the measured conductivity value of 77.5 S x m-1.