Registration Dossier
Registration Dossier
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EC number: 232-259-2 | CAS number: 7803-49-8
Toxicity to terrestrial plants
Administrative data
Link to relevant study record(s)
Description of key information
No information on acute or chronic effects on terrestrial plants is available. However, the substance is highly unstable in the terrestrial 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 "in the absence of toxicity data for soil organisms, the equilibrium partitioning method may be applied to assess the hazard to soil organisms. The choice of the appropriate tests depends on the outcome of the chemical safety assessment. In particular for substances that have a high potential to adsorb to soil or that are very persistent, the registrant shall consider long-term toxicity testing instead of short-term.These studies do not need to be conducted if direct and indirect exposure of the soil compartment is unlikely."
Bis(hydroxylammonium)sulphate has a low potential for adsorption or bioaccumulation and exhibits a very high solubility in water or soil moisture. Distribution modelling clearly shows the main target for environmental distribution will be water (see chapter 5.4.3). Therefore exposure of terrestrial organisms is unlikely. Furthermore, the lacking exposure of Bis(hydroxylammonium)sulphate to terrestrial organisms was already established in EU-RAR draft, 14. May 2008, where it says: "No information is available on effects bis(hydroxylammonium)sulphate on terrestrial ecosystems (plants, earthworms, microorganisms). Due to production methods, processing, and use of bis(hydroxylammonium)sulphate and considering further the distribution behaviour of the substance, a relevant exposure of this compartment can be excluded." Therefore, the equilibrium partitioning method has been used to assess the hazard potential for soil organisms.
Reference:
ECB (2008). EU-RAR Draft, Bis-(hydroxylammonium)sulphate, CAS: 10039 -54 -0,14. May 2008
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