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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Administrative data

Link to relevant study record(s)

Description of key information

Because of the essentiality and the highly anionic nature of the dissociation products of sodium hydrogensulfate, any relevant extent of aquatic bioaccumulation is highly unlikely and testing is not considered necessary.

Key value for chemical safety assessment

Additional information

Sodium hydrogensulfatehas a very low log Pow,readily dissociates in water with an acidic reaction, resulting in hydrogensulfate anions and sodium cations. The hydrogensulfate anion (pKa=1,991) partly dissociates further to sulfate anion and the hydrogen cation. Due to their strong ionic nature of the dissociation products, any relevant extent ofbioaccumulation is unlikely and testing is not considered to be required. Moreover, sulfate and sodium ions are ubiquitous and essential to all forms of lfe, thus beingactively regulatedin organisms.