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Ecotoxicological information

Toxicity to microorganisms

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Link to relevant study record(s)

Reference
Endpoint:
activated sludge respiration inhibition testing
Type of information:
experimental study
Adequacy of study:
weight of evidence
Study period:
September 12, 1975
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
abstract
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:
no
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:
static
Water media type:
freshwater
Limit test:
no
Total exposure duration:
5 d
Duration:
5 d
Dose descriptor:
other: BST
Effect conc.:
> 300 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
other: opacity
Conclusions:
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