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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

Additional information

Short-term as well as long-term aquatic toxicity tests show that sodium chlorate is not very toxic to aquatic organisms.

Short-term tests with fish and invertebrates, freshwater as well as marine species, gave results greater than 1000 mg/l. For long-term tests with fish and daphnids NOEC values greater than 500 mg/l were obtained.

Algae species (freshwater and marine) were more sensitive, but EC50 values were still greater than 100 mg/l and NOECs were greater than 62.5 mg/l. Lemna minor was most sensitive with a NOEC of 10 mg/l.

Two other taxonomic groups of marine organisms were tested as well. Molluscs were not sensitive in a short-term test with a EC50 greater than 1000 mg/l. The rotifer Brachionus plicatilis was the most sensitive marine species with an EC50 of 596 mg/l and an EC10 of 21 mg/l, both based on reproduction.

Taking all aquatic data into account Lemna minor is most sensitive, with a NOEC of 10 mg/l.