Registration Dossier
Registration Dossier
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EC number: 220-971-6 | CAS number: 2950-43-8
Endpoint summary
Administrative data
Description of key information
Additional information
Since no data are available for the test substance, a read-across was made to the inorganic source/surrogate substance Bis(hydroxylammonium)sulphate.
Hydrolysis
The surrogate substance Bis(hydroxylammonium)sulphate is a crystalline salt. In the aqueous environment, the substance is expected to dissociate to [NH3OH]+ and [SO4]2-. The hydroxyl-ammonium ion is rapidly converted to hydroxylamine (free base). Hydroxylamine (free base) is stable in pure water in the absence of oxygen. However, the substance is a strong reduction agent and in the presence of oxygen, metals and other ions is rapidly transformed by abiotic processes (Hollemann-Wiberg, 1995). The ultimative transformation products are ammonium, nitrogen and N2O. The reaction is dependent on the pH. The more basic the environment, the more rapid the transformation.
Adsorption/desorption and distribution
Since bis(hydroxylammonium)sulphate is an inorganic substance dissociating in water, it is not reliable to estimate the distribution using a Mackay-type model. The substance does not exhibit any measurable vapour pressure. Taking into account the inorganic character of bis(hydroxylammonium)sulphate and its high solubility in water, a complete distribution to the aqueous compartment can be expected. Adsorption to organic matter is negligible. Due to the low Log Pow no accumulation in organisms and the food chain is expected. (EU-RAR draft Bis(hydroxylammonium)sulphate, 14 May 2008).
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