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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Endpoint:
activated sludge respiration inhibition testing
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1989
Report date:
1989

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 209 (Activated Sludge, Respiration Inhibition Test
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
2,5-dianilinoterephthalic acid
EC Number:
233-302-8
EC Name:
2,5-dianilinoterephthalic acid
Cas Number:
10109-95-2
Molecular formula:
C20H16N2O4
IUPAC Name:
2,5-bis(phenylamino)benzene-1,4-dicarboxylic acid

Sampling and analysis

Analytical monitoring:
no

Test solutions

Details on test solutions:
The test item was weighed out (1000 mg/L ) directly into the test vessel. Due to the low solubility of the test item 100 mg/L solutizer were added.

Test organisms

Test organisms (species):
activated sludge

Study design

Limit test:
yes
Total exposure duration:
3 h

Results and discussion

Effect concentrations
Duration:
3 h
Dose descriptor:
EC50
Effect conc.:
> 1 000 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.

Applicant's summary and conclusion

Executive summary:

A Respiration Inhibition Test according to OECD Guideline No. 209 was performed with the test item at Hoechst AG, Abteilung Umweltschutz, Frankfurt. The respiration rate of test item was measured after a contact time of three hours. TheEC50 is > 1000 mg/L to activated sludge.