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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Toxicity to microorganisms

Currently viewing:

Administrative data

Endpoint:
toxicity to microorganisms, other
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2001
Reliability:
2 (reliable with restrictions)
Cross-reference
Reason / purpose for cross-reference:
reference to same study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2001
Report date:
2001

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: enhanced OECD 301D
Principles of method if other than guideline:
The study was an OECD 301D biodegradation study, though separate analysis was performed on the toxicity to the innoculum.
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
4-(2-methyloctyl)phenyl bis(4-nonylphenyl) phosphite
EC Number:
701-028-2
Cas Number:
26523-78-4
Molecular formula:
C45H69O3P
IUPAC Name:
4-(2-methyloctyl)phenyl bis(4-nonylphenyl) phosphite
Constituent 2
Reference substance name:
Nonylphenol
EC Number:
246-672-0
EC Name:
Nonylphenol
Cas Number:
25154-52-3
IUPAC Name:
2-nonylphenol
Test material form:
liquid

Sampling and analysis

Analytical monitoring:
yes

Test solutions

Vehicle:
no
Details on test solutions:
15.4 mg/L was added to each replicate.

Test organisms

Test organisms (species):
other: Polyseed Commerical BOD innoculum
Details on inoculum:
Polyseed is a commerical bacterial inncolum encapsulated and used primarily for BOD studies.

Study design

Test type:
static
Water media type:
freshwater
Limit test:
yes
Total exposure duration:
28 d

Test conditions

Test temperature:
20 +/- 1 deg C
Dissolved oxygen:
7.8% initial ; 3.0% final
Reference substance (positive control):
yes
Remarks:
sodium acetate

Results and discussion

Effect concentrations
Duration:
28 d
Dose descriptor:
EC0
Effect conc.:
15.4 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth inhibition
Details on results:
No inhibition of growth. Test concentration is well in excess of water solubility.

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Conclusions:
No inhibition of growth. Test concentration is well in excess of water solubility.
Executive summary:

No inhibition of growth. Test concentration is well in excess of water solubility.