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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

In a 48-h acute toxicity study conducted according to OECD guideline 202, water fleas (Daphnia magna) were exposed to Guanidine phosphate (1:1). The 48h-EC50 was >100 mg/L (corresponding to >33 mg guanidine/L) based on analytically confirmed nominal concentrations. The study is considered to be reliable without restrictions.

Key value for chemical safety assessment

Additional information

In a 48-h acute toxicity study conducted according to OECD guideline 202, water fleas (Daphnia magna) were exposed to Guanidine phosphate (1:1) under static conditions at the following nominal concentrations: 0 (blank control), 0.1, 1, 10 and 100 mg/L. The test substance induced no immobilization in daphnids at a nominal exposure concentration of 100 mg/L. The 48h-EC50 was >100 mg/L (corresponding to >33 mg guanidine/L) based on analytically confirmed nominal concentrations. The study is considered to be reliable without restrictions.