tris (4-nonylphenol, branch) phosphorous acid ester

Toxicity to microorganisms

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

Test material information

Constituent 1

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.