Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 232-259-2 | CAS number: 7803-49-8
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
Acute toxic to aquatic invertebrates
Key value for chemical safety assessment
Additional information
There are two studies available on the acute toxicity of bis(hydroxylammonium)sulphate to Daphnids.
A study on the acute toxicity of for aquatic invertebrates using Daphnia magna performed according to guideline 67/548/EEC, C.2 is available (BASF AG 1988a). The effects were determined using eight (nominal) concentrations between 0.16 and 20 mg/l. In each concentration 20 individuals were tested in four parallels. During the exposure temperature was between 19 and 21°C and pH between 7.0 and 8.0. No effects on mobility were observed in the lower concentrations up to 1.25 mg/l. In 2.5 mg/l all daphnids were immobile after 48 hours of static exposure. The EC50 (48 h) is calculated to be 1.6 mg/l (corresponding to 0.64 mg/l hydroxylamine). The concentrations were not verified analytically. Since the substance is not volatile, very good soluble in water and expected to remain in the water phase, the test is valid with restrictions in spite of the missing analytical verification of the concentrations. However, the results based on nominal concentrations seem to be reliable and might be used for classification and labelling and to assess the risk for aquatic invertebrates.
The EC50 determined in this test is confirmed by a publication of the National Association of Photographic Manufactures (1974) where among other substances the effects of bis(hydroxylammonium)sulphate on Daphnia magna were tested in a static system for 48 hours. The LC50 determined in this test under static exposure for 48 hours was 1.2 mg/l. However, since no detailed information about the test was submitted and no concentrations were measured this value is only of indicative value.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
