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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Administrative data

Link to relevant study record(s)

Description of key information

With high probability acutely not harmful to aquatic algae.

Key value for chemical safety assessment

EC50 for freshwater algae:
120 mg/L
EC10 or NOEC for freshwater algae:
120 mg/L

Additional information

The effect of the reaction mass of phosphorothioic triamide, N-butyl- (NBPT) and phosphorothioic triamide, N-propyl- (NPPT) on

the growth rate of the green algae Desmodesmus subspicatus was investigated in GLP conform limit tests according to OECD guideline 201. After 72 hours of exposure a NOEC >= 120 mg/l was determined .Based on the structural similarities between NBPT and NPPT (NPPT is one CH2 -group shorter), it is assumed that the toxicity of NPPT is in the same range or even lower due its lower Kow value compared to NBPT.