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: 257-861-2
CAS number: 52338-87-1
study was performed to assess the effect of the test material on the
respiration of activated sewage sludge.
The method followed that described in the OECD Guidelines for Testing of
209 "Activated Sludge, Respiration Inhibition Test", EEC Commission
Directive 87/302/EEC and US
EPA Draft Ecological Effects Test Guidelines OPPTS 850.6800.
a preliminary range-finding study, activated sewage sludge was exposed
to an aqueous solution
of the test material at concentrations of 100, 180, 320, 560 and 1000
mg/l for a period of 3
with the addition of a synthetic sewage as a respiratory substrate. The
rate of respiration was determined after 30 minutes and 3 hours contact
time and compared to data for
the control and a reference material, 3,5-dichlorophenol.
effect of the test material on the respiration of activated sewage
sludge gave a 3-Hour EC50 of 820
mg/l. The No Observed Effect Concentration (NOEC) after 3 hours exposure
was 180 mg/l.
The following results were derived:
Test Item: 3 -(DIMETHYLAMIN0)PROPYLUREA EC50 (30 minutes): >1000 mgll
Positive Control: 3,5 -dichlorophenol EC50(30 minutes): 30 mg/l
Variation in respiration rates of controls 1 and 2 after 30 minutes: *
* It was not possible to determine an EC50 value after 30 minutes
contact time as no concentration tested resulted in 50% inhibition of
3-(DIMETHYLAMIN0)PROPYLUREA EC50(3 hours): 820 mg/l
3,5-dichlorophenol EC50 (3 hours): 16 mg/l
Variation in respiration rates of controls 1 and 2 after 3 hours: h 0%.
The No Observed Effect Concentration (NOEC) after 3 hours was 180 mg/l.
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