[No public or meaningful name is available]

Toxicity to microorganisms

Link to relevant study record(s)

Reference

Endpoint:

toxicity to microorganisms

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1974

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Qualifier:

according to guideline

Guideline:

other: internal SOP Method B-10

Deviations:

not specified

Principles of method if other than guideline:

None

GLP compliance:

no

Analytical monitoring:

no

Vehicle:

not specified

Test organisms (species):

activated sludge

Details on inoculum:

Active sewage sludge or activated sludge:
This is taken from the aerated compartment of an Husmann apparatus and has to be prepared freshly on a weekly basis.

Test type:

not specified

Water media type:

freshwater

Limit test:

no

Total exposure duration:

12 h

Remarks on exposure duration:

exposure duration 12-24 hours

Post exposure observation period:

Not applicable.

Test temperature:

25 ± 2 °C

Dissolved oxygen:

Not applicable

Salinity:

Not applicable

Nominal and measured concentrations:

Not specified

Details on test conditions:

See part "Any other information on materials and methods incl. tables".

Reference substance (positive control):

no

Duration:

12 h

Dose descriptor:

IC50

Effect conc.:

> 300 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

growth inhibition

Remarks on result:

other: exposure duration 12-24 hours

Results with reference substance (positive control):

Not applicable

Validity criteria fulfilled:

not specified

Conclusions:

The IC50 for FAT 40069/A was found to be greater than 300 mg/L.

Executive summary:

A key toxicity study of FAT 40069/A to activated sludge was determined in a 3-hours respiration inhibition test according to the internal SOP "Method B-10". The IC50 (3 h) of the test substance FAT 40069/A is greater than 300 mg/L.

Description of key information

The IC50 for FAT 40069/A was found to be greater than 300 mg/L.

Key value for chemical safety assessment

EC50 for microorganisms:

300 mg/L

Additional information

A toxicity study of FAT 40069/A to activated sludge was conducted in a 3-hours respiration inhibition test according to the internal SOP Method B-10. The IC50 (3 h) of the test substance FAT 40069/A is 300 mg/L.