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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
activated sludge respiration inhibition testing
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2007
Report date:
2007

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 209 (Activated Sludge, Respiration Inhibition Test
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Reference substance name:
Fluowet I 800
IUPAC Name:
Fluowet I 800

Test solutions

Vehicle:
no

Test organisms

Test organisms (species):
activated sludge, domestic

Study design

Test type:
static
Water media type:
freshwater
Limit test:
yes
Total exposure duration:
3 h

Results and discussion

Effect concentrations
Duration:
3 h
Dose descriptor:
other: No endpoint assignable
Effect conc.:
> 1 000 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Remarks on result:
other: No effects at water saturation of test item

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Executive summary:

The inbibitory effect of the test item Fluowet I 800 on the respiration rate of aerobic wastewater miccroorganisms of activated sludge was investigated in a 3 -hour respiration inhibition test according to the OECD Guideline 2009. In accordance with the EU Commission Directive 92/69/EEc (C.1, C.2 and C.3), a limit test with a nominal test concentration of 1000 mg/L was performed.

In addition, two controls and three different concentrations of the reference item 3,5 -dichlorphenol (5, 16 and 50 mg/L) were tested in parallel. the results of these treatments confirmed suitability of the activated slufge and the method used.

The test item had no significant inhibitory effect (< 15%) on the respiration rate of activated slufge after the incubation period of three hours at the test item concentration of 1000 mg/l.

Thus, the 3 -hour NOEC (EC15) of the test iten to activated sludge microorganisms was at least 1000 mg/L. this value might even be higher, but concentrations above 1000 mg(L were not tested. The 3 -hour EC20, EC50 and EC80 could not be calculated but were clearly higher than 1000 mg/L