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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 934-716-8 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Additional information
According to column 2 of the REACH annexes on information requirements, no biodegradability tests should be conducted when the substance is inorganic. The substance is a multi constituent substance which consists of water and dissociating inorganic salts mainly. The substance itself does not biodegrade.
However, because of the importance of microorganism-mediated reactions in the natural sulfur cycle, this endpoint is not entirely irrelevant. When sulfide compounds such as Na2S and NaHS are released to the environment, the sulfur in the compounds will enter the natural sulfur cycle. In this cycle, sulfur transformations are mediated to an important extent by sulfur oxidizing and reducing microorganisms. In aerobic environments, sulfur oxidizing microorganisms will transform sulfides into - eventually - sulfates, whereas in anaerobic environments, sulfur reducing microorganisms will reduce oxidized sulfur compounds in the presence of reducing agents. Oxidation of reduced sulfur compounds has been detected in soils, freshwater and marine ecosystems, and biological waste water treatment plants. These findings demonstrate the wide distribution of sulfide transforming microorganisms. Half-lives for sulfide oxidation between 0.4 and 65 h have been reported, depending on the environment under consideration (Bagarinao, 1992). These half-lives represent half-lives based on combined abiotic and microorganism-mediated oxidation reactions.
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.
