Barium di(acetate)

Short-term toxicity to fish

Additional information

One reliable acute toxicity data point (Klimisch 1, GLP) for a fish species -the zebrafish Danio rerio - has been identified. No effect (mortality) was noted at a nominal test concentration of 100 mg Ba²⁺/L.

Both the dissolved and total fraction was measured. A white substance was noted in the solution upon addition of BaCl₂, most likely caused by the formation of the poorly soluble barium sulfate.

However, at a nominal concentration of 100 mg Ba²⁺/L, the dissolved and total barium concentrations were 3.5 and 97.5 mg/L, respectively.

Translating the latter value to BaCl₂, a 96h-LC₅₀of > 147.8 mg BaCl₂/L is derived based on total barium concentration in test solution. Nevertheless, re-calculation of the 96h-LC50 of > 3.5 mg dissolved barium/L results in an LC₅₀of > 5.3 mg BaCl₂/L.