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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
phototransformation in soil
Type of information:
experimental study
Adequacy of study:
other information
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Referenceopen allclose all

Reference Type:
publication
Title:
Effects of light on the organophosphorus fungicide ditalimfos and two degradation products examined in rainwater and on soil surface in a long-term study
Author:
Allmaier GM and Schmid ER
Year:
1986
Bibliographic source:
Bodenkultur 37 (2), 177-186.
Reference Type:
secondary source
Title:
Phthalimide - CAS No: 85-41-6
Author:
OECD SIDS
Year:
2005
Bibliographic source:
SIDS Initial Assessment Report for 20th SIAM, UNEP Publications

Materials and methods

Principles of method if other than guideline:
Method: radiation apparatus as described by Allmaier and Schmid (1985)
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Phthalimide
EC Number:
201-603-3
EC Name:
Phthalimide
Cas Number:
85-41-6
Molecular formula:
C8H5NO2
IUPAC Name:
1H-isoindole-1,3(2H)-dione
Details on test material:
Test Substance: Ditalimfos, > 99.5 % purity, purchased from Dow Chemical Company
Phthalimide was identified to be a degradation product of Ditalimfos, and its degradation was also followed during the study.

Study design

Light source:
other: 5 daylight-lamps of different thermoluminescence
Light spectrum: wavelength in nm:
> 290

Results and discussion

Transformation products:
yes

Any other information on results incl. tables

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 reach 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