Reaction mass of N-butylphosphorothioic triamide and N-propylphosphorothioic triamide

Additional information on environmental fate and behaviour

Administrative data

Endpoint:

additional information on environmental fate and behaviour

Type of information:

calculation (if not (Q)SAR)

Remarks:

Migrated phrase: estimated by calculation

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP compliant modeling study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2012

Report date:

2012

Materials and methods

Principles of method if other than guideline:

The calculations were performed with the groundwater leaching model FOCUS-PEARL 4.4.4 under consideration of nine European scenarios (Châteaudun, Jokioinen, Hamburg, Okehampton, Kremsmünster, Piacenza, Porto, Sevilla, Thiva) as parameterized by FOCUS (FOrum of the Coordination of pesticide fate models and their USe).
Each scenario descroption includes soil and climate characteristics of the location as well as growth characteristics for a range of typically cultivated crops.

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

-

EC Number:

435-740-7

EC Name:

-

Cas Number:

94317-64-3

Molecular formula:

C4 H14 N3 P S

IUPAC Name:

N-butylphosphorothioic triamide

Details on test material:

- Name of test substance (as cited in study report): N-(n-butyl)thiophosphoric triamide (NBPT)
- NBPT is the main compound of the urease inhibitor Limus-Sambaydestillation

Results and discussion

Any other information on results incl. tables

The maximum 80th percentiles of the predicted annual average leachate concentrations following application of Limus onto various crops at the different FOCUS locations was estimated for the winter cereals scenario at Okehampton with 0.041 µg/L of NBPT.