Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Tests performed with sodium chlorate can be used in this dossier, because the toxicity of the test substance is caused by the chlorate ion. In soil sodium and potassium are naturally present and the amounts added with the test substance are not considered to have an impact on the total concentration and on the test result, therefore the counter ion present is not relevant for the test result.


Several test with terrestrial organisms are available for sodium chlorate.

Terrestrial bacteria were most sensitive to sodium chlorate. For nitrogen mineralization a NOEC of 0.333 g/kg can be used. On a molecular weight basis this is 0.383 g/kg potassium chlorate.

Facultative anaerobic bacteria are responsible for that 350 mg/kg were reduced in the 1.67 g/kg treated group. The carbon mineralization was not significantly reduced by sodium chlorate.

Two worm species were tested Eisenia fetida and Lumbricus terrestris L.. For both species 50% effect was not reached. The LC50 for soil dwelling organisms is greater than 750 mg/kg soil dw sodium chlorate. On a molecular weight basis this is 863 mg/kg soil dw potassium chlorate.

Additional information