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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Adsorption / desorption

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Description of key information

This property indicates the binding capacity (or stickiness) of a substance to solid surfaces, and so is essential for understanding environmental partitioning behaviour. Information on adsorption/desorption is required because it indicates where a substance will be found in the environment and how it may partition between environmental compartments. This information has a marked bearing on the ecotoxicological assessment of the substance and also its bioavailability. Adsorption is caused by temporary (reversible) or permanent bonding between the substance and a surface (e.g. due to Van der Waals interactions, hydrogen bonding to hydroxyl groups, ionic interactions, covalent bonding, etc.).
According to Column 2 of Annex IX and X (standard information requirements for substances manufactured or imported in quantities of 100 tonnes or more and 1000 tonnes or more, respectively) of Regulation (EC) No 1907/2006 the test does not need to be conducted if based on the physicochemical properties the substance can be expected to have a low potential for adsorption.
Sulphuric acid, compound with graphite is an inorganic solid, consisting of natural graphite and variable amounts of intercalated sulphuric acid. The substance has no functional groups that would suggest the ability to adsorb to solid surfaces. Due to its physical-chemical properties (no relevant functional groups for adsorption), sulphuric acid compound with graphite is unlikely to show adsorption/desorption behaviour and testing is not required under Regulation (EC) No 1907/2006 (REACH).

Key value for chemical safety assessment

Additional information