Registration Dossier
Registration Dossier
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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.
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EC number: 226-798-2 | CAS number: 5470-11-1
Adsorption / desorption
Administrative data
Link to relevant study record(s)
- Endpoint:
- adsorption / desorption: screening
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- other:
Reference
Description of key information
Key value for chemical safety assessment
- Koc at 20 °C:
- 6.5
Additional information
Hydroxylammonium chloride is the hydrochloric acid salt of hydroxylamine. The substance bears a high water solubility of approx. 470 g/L (at 20°C) and is expected to be mainly present in water in case of release into the environment. Hydroxylammonium chloride will dissociate in aqueous environments to hydroxylammonium and chloride ions. The adsorption properties of hydroxylammonium are expected to be similar to those of ammonium due to their similar chemistry. Kd values between 0 and 6.5 L/Kg are reported for ammonium in public literature, which indicate a low potential for adsorption. The highest Kd value of 6.5 L/Kg was used as a worst case concerning the exposure of soil organisms and was used for further assessment. Since hydroxylammonium chloride is not considered stable under environmental conditions, the above mentioned Kd values represent a worst case scenario.
References:
Buss S.R., Herbert A.W., Morgan P., Thornton S.F., Smith J.W.N. 2004. A review of ammonium attenuation in soil and groundwater. Q. J. Eng. Geol. Hydrogeol. vol 37, 347–359
Ranjbar F. & Jalali M. 2013. Measuring and modeling ammonium adsorption by calcareous soils. Environ Monit Assess vol. 185, 3191–3199
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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