Registration Dossier
Registration Dossier
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EC number: 231-977-3 | CAS number: 7783-06-4
Endpoint summary
Administrative data
Description of key information
Additional information
As summarized in Hazardous Substances DataBase (HSDB), microorganisms in soil and water are involved in oxidation-reduction reactions which oxidize hydrogen sulphide to elemental sulfur. Members of the genera Beggiatoa, Thioploca, and Thiotrix function in transition zones between aerobic and anaerobic conditions where both molecular oxygen and hydrogen sulphide are found. Also, some photosynthetic bacteria oxidize hydrogen sulphide to elemental sulfur. Members of the families Chlorobiaceae and Chromatiaceae (purple sulfur bacteria) are obligate aerobes and are phototropic, and are found in waters with high H2S concentrations. The interactions of these organisms form part of the global sulfur cycle.
But hydrogen sulphide being an inorganic compound, it cannot be tested for (ready) biodegradability. This is acknowledged in column 2 of REACH regulation Annex VII: “9.2.1.1. The study does not need to be conducted if the substance is inorganic”.
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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