Registration Dossier

Administrative data

Endpoint:
biodegradation in soil
Type of information:
experimental study
Adequacy of study:
other information
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: MIGRATED DATASET; Study meets generally accepted scientific principles

Data source

Reference
Title:
No information
Author:
Allmaier GM and Schmid ER (1985). Effects of light on the organophosphorus pesticides bromophos and iodofenphos and their main degradation products examined in rainwater and on soil surface in a long-term study. J. Agric. Food Chem. 33, 90-92.

Materials and methods

Principles of method if other than guideline:
Method: other: incubation in radiation apparatus
GLP compliance:
no
Test type:
laboratory

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
IUCLID4 Test substance: other TS: Ditalimfos, > 99.5 % purity, purchased from Dow Chemical Company

Study design

Soil classification:
other: Speyer Standard Soil
Soil properties
% Clay:
8.8
% Silt:
6.5
% Sand:
84.8
% Org. C:
2.6
pH:
5.8
Experimental conditions
Temp.:
25 °C
Humidity:
12 g water/100g soil dry weight

Results and discussion

% Degradation
% Degr.:
100
Sampling time:
36 d
Half-life / dissipation time of parent compound
Type:
(pseudo-)first order (= half-life)

Any other information on results incl. tables

MIGRATED DATASET;
In both illuminated and non-illuminated test systems phthalimide reached  its concentration maximum after 12 days and was completely removed after  another 36 days

The same main degradation products were found regardless of the light conditions: 0,0-diethyl-phosphoro-amidothioate (main product) and phthalimide.
Ditalimfos t1/2 = 428 h (illuminated soil)
Ditalimfos t1/2 = 442 h (nonilluminated soil)
Phthalimide reached the maximum after 12 days. Phthalimide could not be detected after 48 days in both soils. Ditalimfos was not detectable in both test systems after 96 days.

Applicant's summary and conclusion