Main component 6 (isomer): asym. 1:2 Cr(III)-complex of: A: 3-hydroxy-4-(2-hydroxy-naphthalene-1-ylazo)naphthalene-1-sulfonic acid, Na-salt and B: 1-[2-hydroxy-5-(4-methoxy-phenylazo)phenylazo]naphthalene-2-ol; Main component 8 (isomer): asym. 1:2 Cr-complex of: A: 3-hydroxy-4-(2-hydroxy-naphthalene-1-ylazo)-naphthalene-1-sulfonic acid, Na-salt and B: 1-[2-hydroxy-5-(4-methoxy-phenylazo)-phenylazo]-naphthalene-2-ol

Toxicity to microorganisms

Administrative data

Endpoint:

activated sludge respiration inhibition testing

Type of information:

experimental study

Adequacy of study:

key study

Data source

Reference

Title:

Unnamed

Year:

1995

Report date:

1995

Materials and methods

Test guideline

Guideline:

OECD Guideline 209 (Activated Sludge, Respiration Inhibition Test

Test material

Test material information

Constituent 1

Test material form:

solid: particulate/powder

Test organisms

Test organisms (species):

activated sludge, domestic

Study design

Test type:

not specified

Limit test:

no

Total exposure duration:

30 min

Test conditions

Reference substance (positive control):

yes

Results and discussion

Effect concentrations

Duration:

30 min

Dose descriptor:

EC50

Effect conc.:

> 100 mg/L

Conc. based on:

test mat.

Applicant's summary and conclusion

Validity criteria fulfilled:

yes