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Ecotoxicological information

Short-term toxicity to fish

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Administrative data

Link to relevant study record(s)

Description of key information

The substance is acutely harmful to fish.

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
58 mg/L

Additional information

Data on the acute toxicity of vanadylhydrogenphosphate-hemihydrate (CAS no. 93280-40-1) to fish are not available; therefore, a read-across approach to the structurally similar substance divanadyl pyrophosphate (CAS 65232-89-5; Catalyst E-326) was performed. The reliable guideline study followed OECD 203 with Catalyst E-326 as test item. The study was performed under GLP. The test species was Oncorhynchus mykiss (rainbow trout). The test system was static. Five test concentrations were prepared in a range between 100 and 1000 mg/L test material. The test concentrations were analytically verified by Atomic Absorption Spectrometry for the vanadium content with and without filtration (0.2 µm) of the test solutions. At all concentration levels undissolved test material was visible in suspension and on the bases of the test vessels. During the test undissolved test material settled out of suspension. The 96-h LC50 was determined to be 51.8 mg/L (test material; meas., filtered). Based on the vanadium concentration the 96-h LC50 is 17 mg/L (meas., filtered).

For the assessment of the toxicity of vanadylhydrogenphosphate-hemihydrate (CAS no. 93280-40-1), the effect value based on the vanadium concentration must be corrected for the molecular weight of vanadylhydrogenphosphate-hemihydrate (29.4% V). The corrected 96-h LC50 is 58 mg/L (= 17 mg V/L).

It can be concluded that the substance is acutely harmful to fish.