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: 266-019-3 | CAS number: 65996-85-2 The reaction product obtained by neutralizing coal tar oil alkaline extract with an acidic solution, such as aqueous sulfuric acid, or gaseous carbon dioxide, to obtain the free acids. Composed primarily of tar acids such as phenol, cresols, and xylenols.
Data taken from phenol dossier for read-across (phenol content in the substance up to 50% (w/w).Several biodegradation tests were performed following or according to standard methods. Aerobic degradation in waste water, freshwater, seawater and anaerobic degradation was investigated. Following concentrations were applied:waste water, activated sludge - MITI I test: 100 mg/Lfresh water - BOD test: 3 - 10 mg/Lsalt water - BOD test: 3 - 10 mg/Lanaerobic degradation - 1 - 5 mMIn all aerobic tests degradation rates > 70 % were achieved within a short period (< 10 d). In the anaerobic test 100 % biodegradation was achieved up to a concentration of 4 mM.
Data on biodegradation of phenol in water is presented in the EU-RAR (2006) in Section 188.8.131.52.1 (page 11ff).
It is stated that only two standardised tests for ready biodegradability are available. In these MITI-I-tests, levels of degradation amounting to between 60 and 70 % (after 4 days) and to 85 % (after 14 days) were determined (Urano & Kato, 1986; MITI, 1992). With these results phenol can be classified as readily biodegradable. The results from the other available tests also point toward ready biodegradability. On account of the ubiquitous occurrence of phenol, adaptation is to be assumed in the case of all of the inocula. Since this also applies to WWTPs, a degradation rate constant of k = 1 h-1 can be used for them.
In various degradation studies employing adapted microbial inocula (e.g. activated sludge from industrial wwtp) removal rates in the range of 98.5-100 % were demonstrated (BUA, 1997).
Due to the high degradation rates within a period of < 10 days phenol is ready biodegradable in waste water, freshwater, sea water, and at anaerobic conditions with inoculum created from activated sludge.
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.
Welcome to the ECHA website. This site is not fully supported in Internet Explorer 7 (and earlier versions). Please upgrade your Internet Explorer to a newer version.
Close Do not show this message again