Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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)
Rationale for reliability incl. deficiencies:
other: The test item is the substance in water at 30g/l

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Report date:
1991

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 209 (Activated Sludge, Respiration Inhibition Test
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Reaction mass of 1,3'-Bipyridinium, 1'-[3-(dimethylamino)propyl]-6'-hydroxy-4'-methyl-2'-oxo-, inner salt and 1,3'-Bipyridinium, 1'-[3-(dimethylamino)propyl]-1',6'-dihydro-2'-hydroxy-4'-methyl-6'-oxo-, chloride (1:1)
Molecular formula:
not applicable (reaction mass)
IUPAC Name:
Reaction mass of 1,3'-Bipyridinium, 1'-[3-(dimethylamino)propyl]-6'-hydroxy-4'-methyl-2'-oxo-, inner salt and 1,3'-Bipyridinium, 1'-[3-(dimethylamino)propyl]-1',6'-dihydro-2'-hydroxy-4'-methyl-6'-oxo-, chloride (1:1)
Test material form:
other: concentrated solution

Sampling and analysis

Analytical monitoring:
no

Test solutions

Vehicle:
no

Test organisms

Test organisms (species):
activated sludge, domestic

Study design

Test type:
static
Water media type:
freshwater
Limit test:
yes
Total exposure duration:
3 h

Test conditions

Reference substance (positive control):
yes
Remarks:
3,5-dichlorphenol

Results and discussion

Effect concentrations
Duration:
3 h
Dose descriptor:
IC50
Effect conc.:
> 100 mg/L

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Conclusions:
The respiration rate of the sludge was not inhibited by test item
Executive summary:

The influence of HMDPY on the respiration rate of activated sludge is presented in Table 7.

The table shows that the respiration rate of the sludge was not inhibited (2.6 %) at the highest concentration of HMDPY of 100 mg/1.

The IC 50 value was determined to be: IC 50: > 100 mg/1.