Registration Dossier
Registration Dossier
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EC number: 235-819-4 | CAS number: 12777-87-6
Bioaccumulation: aquatic / sediment
Administrative data
Link to relevant study record(s)
Description of key information
Bioaccumulation refers to uptake from all environmental sources including water, food and sediment.
According to column 2 of Annex IX (standard information requirements for substances manufactured or imported in quantities of 100 tonnes or more) of Regulation (EC) No 1907/2006 a study on bioaccumulation in aquatic species does not need to be conducted if the substance has low potential for bioaccumulation and/or a low potential to cross biological membranes or if direct and indirect exposure to the aquatic compartment is unlikely.
Sulphuric acid, compound with graphite is an inorganic solid, consisting of natural graphite and variable amounts of intercalated sulphuric acid.
Graphite is a naturally occurring solid substance which is insoluble in water. Due to its physico-chemical properties it is not systemically and biologically available and does not cross biological membranes. In the aquatic compartment it can be considered as an inert substance.
The intercalated sulphuric acid is partially leached out by water and dissociated into the environmentally ubiquitous sulphate and hydronium ions. This total ionisation makes the accumulation in living tissues unlikely. Furthermore sulphate is a normal biological metabolite and also a degradation product of sulphur-containing amino-acids.
Due to the inorganic character of the substance and the absence of intrinsically lipophilic functional groups, which would facilitate the diffusion across biological surfaces (e.g. the fish gill or digestive tract epithelium), a biological uptake via membranes can therefore be excluded. Referring to this uptake, bioaccumulation and a subsequent biomagnification, which might lead to adverse effects along the food chain, is not given.
Against this background and due to the physical-chemical properties of sulphuric acid compound with graphite performance of a study on aquatic bioaccumulation is not required under Regulation (EC) No 1907/2006 (REACH).
Key value for chemical safety assessment
Additional information
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