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: 200-315-5
CAS number: 57-13-6
Urea is considered to be readily biodegradable.
The degradation of urea was investigated in psychrophilic bacteria in an
aqueous test system. The maximum degradation rate per hour at 20 ⁰C
was 11.6 mg/L. The average degradation rate per hour at 20 ⁰C
was 10.9 mg/L. The maximum degradation rate per hour at 2 ⁰C
was 4.0 mg/L. The average degradation rate per hour at 2 ⁰C
was 3.2 mg/L.
The biodegradation of urea was investigated in activated sludge from a
laboratory sewage treatment facility fed with adapted domestic and
synthetic sewage. Degradation levels of 3% (3 hours), 52% (7 hours), 60%
(10 days), 85% (14 days) and 96% (16 days) was seen. Urea is ultimately
biodegradable according to this study.
The biodegradation of dimethyl urea was investigated in a DOC-die away
study. The biodegradation (DOC removal) after 21 days is 90-100%.
Dimethyl urea is therefore readily biodegradable according to OECD
criteria. The degree of degradation of the reference substance was 100%
after 21 day and the degradation degree in inhibition control was 101%.
The validity criteria is therefore met according to OECD criteria.
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.
Do not show this message again