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EC number: 219-260-3 | CAS number: 2397-00-4
The third determination was not used for the evaluation because of occurrence of error.
Oxygen consumption - blank
The determination of the test item chemical oxygen demand (COD) was performed according to DIN guideline 38 409. Due to insufficient solubility, no stock solution was used; the test substance was weighed directly into the container batches. Organisms were collected from municipal wastewater treatment plant Frankfurt/M-Sindlingen. No biodegreadation was observed over a period of 28 days, thus, the test item resulted to be not biodegradable under the conditions of the experiment.
Not ready biodegradable
Nor readily biodegradable.
The substance is a fluorescent brightener, benzoxazolyl stilbene derivative. It is not expected to be ready biodegradable because of its chemical structure and the specific function. Commonly, fluorescent brighteners undergo a primary transformation, i.e. interruption of the conjugation. However, the degradation process involves more steps and takes more time.
An experiment on the determination of the chemical oxygen demand (COD) is available on a structural analogue, i.e. Similar Substance 01; the read across approach can be considered as suitable and appropriate to investigate the biodegradabiity potential of Fluorescent Brightener 002. The read across approach is detailed in section 13.
The experiment was performed according to DIN guideline 38 409. No biodegreadation was observed over a period of 28 days, confirming the expectation that the substance is not readly biodegradable.
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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