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EC number: 947-136-5 | CAS number: -
- Life Cycle description
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- Endpoint summary
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- Additional toxicological data

Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
The biogradation value is 60 % after 28 days.
Key value for chemical safety assessment
- Biodegradation in water:
- inherently biodegradable, fulfilling specific criteria
Additional information
The evaluation of biodegradation of the substance has been based on studies conducted on the Similar Substance 01. The complete hypothesis and justification for the read across approach has been attached in section 13.
Three different tests are available to evaluate the biodegradability potential in water of the substance: one regarding the inherent biodegradability and two regarding the biochemical and/or chemical oxygen demand.
The inherent biodegradability test was carried out according to the OECD Guideline 302C. The biogradation value is 60 % after 28 days. This result is obtained at 25 ± 2 °C and in darkness.
Two studies on BOD5 and COD are available for this substance, therefore they have been used together with the previous test as supporting studies in order to exclude a rapidly biodegradation of the substance, in fact, according to the ECHA "Guidance on information requirements and chemical safety assessment - Chapter R.7b: Endpoint specific guidance" (May 2008 version 1.1), if the BOD5:COD ratio is lower than 0.5, it can be expected that the substance is not readily biodegradable; if the ratio between BOD5 and COD is more than 0.5 there is an indication of ready biodegradation.
In the first one, COD was measured according to DIN 38409 - H 41-1 method (1980) corresponding to EEC Directive 92 / 69 / C.6. (1992). The value found is 1289 mg O2/g; it is of the same order of magnitude as the value reported in the study of 1977.
In the second one, BOD, COD and BOD/COD ratio were measured according to an internal method (details of the method have been not reported). The results obtained are:
BOD5 = 11 mg/g O2
COD = 983 mg/g O2
BOD5/COD = 0.01
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.

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