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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 215-686-9 | CAS number: 1344-08-7
Endpoint summary
Administrative data
Description of key information
Additional information
A valid ready biodegradability test result for polysulfides is not available because this substance is inorganic. Nevertheless all aspects important for achieving a ready biodegradability test result i.e. 1) ultimate (complete) biodegradation, 2) high rates of degradation and 3) occurrence of competent microorganisms in unacclimatised ecosystems are fulfilled. Ready biodegradability tests only detect growth-linked biodegradation. Microorganisms are capable of growth on polysulfides under aerobic conditions (formation of sulfate (completely oxidized)) and anaerobic conditions in the presence of a reducing agent (formation of hydrogen sulfide (completely reduced)). Maximum growth rates of > = 0.8h-1are sufficiently high to enable a ready biodegradability test result. Transformation of reduced sulfur compounds has been detected in soils, fresh water, marine ecosystems and biological wastewater treatment plants. These findings demonstrate the wide distribution of polysulfide transforming microorganisms. Polysulfides should therefore be classified as readily biodegradable.
Table Summary of degradation rate constants in various (eco)systems based on the ready biodegradability of polysulfides using TGD default values.
(Eco)system |
Method |
Result |
Comment |
Surface water (fresh) |
TGD default value |
Half live 15 days |
Classification: readily biodegradable |
Surface water (fresh) |
Growth rate of sulfide oxidixing miroorganisms |
Half live 1 hour |
Result of publication in peer reviewed journal |
Aerobic sediment layer |
TGD default value |
Half live 30 days |
Kpsed 1.7 l/kg default of non hydrophobic |
Anaerobic bulk sediment |
TGD default value |
Half live 30 days |
Kpsed 1.7 l/kg default of non hydrophobic |
Marine water |
TGD default value |
Half live 50 days |
Classification: readily biodegradable |
Marine water sediment |
TGD default value |
Half live 100 days |
Kpsed 1.7 l/kg default of non hydrophobic |
Soils |
TGD default value |
Half live 30 days |
Kpsoil 0.7 l/kg default of non hydrophobic |
Degradation in sewage treatment plants |
Determined with bioreactor |
>99% |
Results of publications in peer reviewed journal (Vaiopoulou et al, 2005) |
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.
