Registration Dossier
Registration Dossier
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EC number: 232-259-2 | CAS number: 7803-49-8
Sediment toxicity
Administrative data
Link to relevant study record(s)
Description of key information
No data on sediment toxicity are available. However, the substance is not persistent in the sediment compartment. The equilibrium partitioning method has been used for assessing the hazard to sediment organisms.
Key value for chemical safety assessment
Additional information
In Annex X of the Regulation (EC) No 1907/2006 REACH concerning the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH), it is suggested, that "long-term toxicity testing shall be proposed by the registrant if the results of the chemical safety assessment indicates the need to investigate further the effects of the substance and/or relevant degradation products on sediment organisms. The choice of the appropriate test(s) depends on the results of the chemical safety assessment."
Bis(hydroxylammonium)sulphate has a low potential for adsorption or bioaccumulation and exhibits a very high solubility in water. Therefore exposure of sediment organisms is unlikely and testing towards sediment dwelling organisms not necessary. The lacking exposure to sediment organisms was already established in EU-RAR draft, 14. May 2008: "The effects on invertebrates were tested exclusively on the pelagic species Daphnia magna. No information concerning effects on sediment-organisms is available. However, since the physicochemical data indicate that the substance is not very adsorptive or bioaccumulative, a relevant distribution into the sediment compartment and a considerable exposure of sediment organisms are not expected. Hence, information about effects on sediment organisms is not required." The equilibrium partitioning method has been used for assessing the hazard to sediment organisms.
Reference:
ECB (2008). EU-RAR Draft, Bis-(hydroxylammonium)sulphate, CAS: 10039 -54 -0,14. May 2008
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