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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Key value for chemical safety assessment

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Short term effects on the algae Pseudokirchneriella subcapitata (formerly Selenastrum capricorntum) were observed at 40 mg B/L.

Equivalent concentrations of potassium pentaborate would be:

Anhydrous: 164 mg/L,

Tetrahydrate: 217 mg/L.

These data support a conclusion that borates should not be classified as dangerous for the environment.