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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

activated sludge respiration inhibition testing
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
September 12, 1975
4 (not assignable)
Rationale for reliability incl. deficiencies:
Principles of method if other than guideline:
CIBA-GEIGY internal method N° 58. This method is designed to evaluate the acute bacterial toxicity to sewage sludge or isolated suspended bacteria under aerobe conditions.
GLP compliance:
Test organisms (species):
activated sludge
Details on inoculum:
0.1 ml of dilutions are mixed with 4.5 ml of Nutrient broth in a test tube.
Test type:
Water media type:
Limit test:
Total exposure duration:
5 d
5 d
Dose descriptor:
other: BST
Effect conc.:
> 300 mg/L
Nominal / measured:
Conc. based on:
test mat.
Basis for effect:
other: opacity
BST > 300 mg/l
Executive summary:

The substance has been tested for bacteria growth inhibition according to internal method 58.

The substance shows a BST> 300 mg/l.

Description of key information

BST > 300 mg/l

Key value for chemical safety assessment

Additional information

CIBA GEIGY internal method 58