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Administrative data

Endpoint:
adsorption / desorption
Remarks:
other:
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
The data was derived from a report of NATIONAL INDUSTRIAL CHEMICALS NOTIFICATION AND ASSESSMENT SCHEME (NICNAS), which is administered by the National Occupational Health and Safety Commission (NOHSC) of Australian Commission. Also the test was determined using OECD test methods.

Data source

Reference
Reference Type:
review article or handbook
Title:
Phosphoric acid, (1-methylethylidene) di-4,1-phenylene tetraphenyl ester (Fyrolflex BDP)
Author:
National Occupational Health and Safety Commission (Australia)
Year:
2000
Bibliographic source:
In:NATIONAL INDUSTRIAL CHEMICALS NOTIFICATION AND ASSESSMENT SCHEME

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
other: OECD TGP/94.75
GLP compliance:
not specified
Type of method:
HPLC estimation method
Media:
other:

Test material

Constituent 1
Chemical structure
Reference substance name:
-
EC Number:
425-220-8
EC Name:
-
Cas Number:
5945-33-5
Molecular formula:
C39H34O8P2
IUPAC Name:
(1-methylethylidene)di-4,1-phenylenetetraphenyl diphosphate
Radiolabelling:
no

Study design

HPLC method

Details on study design: HPLC method:
The value for log Koc, which is a measure of the compound’s ability to bind to the organic component of soils and sediments was also determined by Hogg A S (1997) by comparising retention times on a C18 HPLC column. The method used was by Kordel W (undated) similar to Method OECD TGP/94.75. Fifteen reference compounds were employed ranging from simazine with log Koc = 1.77, to cyfluthrin with log Koc = 4.53.

Results and discussion

Adsorption coefficientopen allclose all
Type:
Koc
Value:
>= 33 900
Type:
log Koc
Value:
>= 4.53

Results: HPLC method

Details on results (HPLC method):
Since the retention time of the BDP was greater than that of cyfluthrin, the value for log Koc exceeds 4.53.

Any other information on results incl. tables

This high value for log Koc indicates that the chemical will bind strongly to the organic component of soils and sediments, and low mobility in these media.

Applicant's summary and conclusion

Validity criteria fulfilled:
not specified
Conclusions:
The compound has a large Koc (log Koc > 4.53), indicating strong affinity for the organic
component of soils and sediments, and low mobility in these media.
Executive summary:

Fifteen reference compounds were employed ranging from simazine with log Koc = 1.77, to cyfluthrin with log Koc = 4.53. Since the retention time of the BDP was greater than that of cyfluthrin, the value for log Koc exceeds 4.53. This high value for log Koc indicates that the chemical will bind strongly to the organic component of soils and sediments.