Tris(2-chloro-1-methylethyl) phosphate

Toxicity to aquatic algae and cyanobacteria

Description of key information

The test gave a 72-h ErC50 value for effects on growth rate of 82 mg/l, a 72-h ErC10 of 42 mg/l and a NOEC of 13 mg/l. These results are below the reported water solubility value for TCPP of 1080 mg/l.

Key value for chemical safety assessment

EC50 for freshwater algae:

82 mg/L

EC10 or NOEC for freshwater algae:

42 mg/L

Additional information

The test with P. subcapitata fulfilled all the reliability criteria. The test gave a 72-h ErC₅₀value for effects on growth rate of 82 mg/l, a 72-h ErC₁₀of 42 mg/l and a NOEC of 13 mg/l. These results are below the reported water solubility value for TCPP of 1080 mg/l.

Estimated 96-hour EC50 and NOEC values of 1.8 and 1.4 mg/l have been derived for algae using an ECOSAR QSAR applicable to esters. The estimated values are lower than those obtained in the reported studies.