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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Short-term toxicity to aquatic invertebrates

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Administrative data

Link to relevant study record(s)

Description of key information

The results of a number of published and proprietary studies are available.

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
900 mg/L

Additional information

Bringmann & Kuehn (1982) describe an improved standardised procedure for the assessment of the toxic effects of chemicals on Daphnia magna. The 24 -hour EC0, EC50 and EC100 values for Daphnia magna (immobilisation) were calculated to be 603 mg/L, 900 (841 -1061) mg/L and 1250 mg/L respectively, under the conditions of this study.

Ewell et al (1986) describe the development of a test system designed to simultaneously assess the aquatic toxicity of chemicals to seven species, including six invertebrate species. Under the conditions of this study, the 96 -hour LC50 of triethyl phosphate in the invertebrate species tested [Asellus intermedius (pillbug), Daphnia magna (water flea), Dugesia tigrina (flatworm), Gammarus fasciatus (sideswimmer), Helisoma trivolvis (snail) and Lumbriculus variegatus (segmented worm)] were all reported to b >100 mg/L.

Knie et al (1983) report the results of a series of aquatic toxicity tests with various chemicals. EC0, EC50 and EC 100 values for triethyl phosphate in Daphnia magna of 500, 950 and 1500 mg/L respectively are reported.

The acute toxicity of triethyphosphate was assesed in Daphnia magna Straus in a range-finding study for the reproductive toxicity study. The 24 -hour EC0, EC50 and EC100 values for triethyphosphate in Daphnia magna were found to be 1000 mg/L, 2705 mg/L and 5000 mg/L respectively, under the conditions of this test (Bayer, 1987).