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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Toxicity to microorganisms

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
activated sludge respiration inhibition testing
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Qualifier:
according to guideline
Guideline:
ISO 8192 (Water quality - Test for inhibition of oxygen consumption by activated sludge for carbonaceous and ammonium oxidation)
GLP compliance:
no
Analytical monitoring:
no
Test organisms (species):
activated sludge, domestic
Test type:
static
Water media type:
freshwater
Total exposure duration:
30 min
Reference substance (positive control):
yes
Remarks:
3,5-Dichlorophenol
Key result
Duration:
30 min
Dose descriptor:
other: EC20
Effect conc.:
> 1 000 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
inhibition of total respiration
Remarks:
respiration rate
Results with reference substance (positive control):
EC50 = 4.5 mg/L

Description of key information

 The 30 minute EC20 value is >1000 mg/L (nominal) as observed in a respiration inhibition study with activated sludge of a predominantly domestic sewage.

Key value for chemical safety assessment

Additional information

The effects of alcohols, C13 -15 -branched and linear on aquatic microorganisms were investigated in a non-GLP short-term respiration test according to international standard ISO 8192 using activated sludge form a predominantly domestic source. The total exposure duration was 30 minutes under static conditions. A 30 minute EC20 value was determined at >1000 mg/L (nominal).