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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

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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

Sodium sulfate is not toxic to fish. The study according to EPA guideline with Pimephales promelas gave an LC50 value of 7960 mg/l.  Read-across from sodium sulfate and sulfuric acid to sodium hydrogensulfate is considered justified. Threfore it can be concluded that sodium hydrogensulfate has no acute-toxic properties to fish.

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
7 960 mg/L

Additional information

Many publications are available on short-term toxicity of sodium sulfate to fish, but most were not found reliable. Only one study was reliable with restrictions, Mount et al. (1997). The study was performed according to EPA guideline and with determination of test substance concentrations (ion-chromatography).

It was not performed under GLP. Pimephales promelas was exposed to a range of sodium sulfate concentrations in reconstituted water. The critical confounding factors pH and oxygen were within acceptable ranges. The acute toxicity for fish is very low, with LC50values far above 1,000 mg/l.