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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Environmental fate & pathways


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Administrative data

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Description of key information

A read-across approach is considered between sodium chlorate (source) and potassium chlorate (target) because the toxicity of the test substance is expected to be related to the chlorate ion and not to the sodium or potassium ion. The conclusions drawn for sodium chlorate are also valid for potassium chlorate.

Sodium chlorate in aqueous solutions is known for its chemical stability under environmental conditions (hydrolytic stable) (Urbanski 1998) and it is rapidly biodegradable under anaerobic conditions. 

Based on the chemical structure it is expected that sodium chlorate is resistant to hydrolysis. Due to its chemical structure, sodium chlorate is considered as stable in sterile water whatever the pH is. There are no relevant metabolites, degradation or reaction products that necessitate studies to answer this point.

Studies on the hydrolysis as a function of the pH are therefore not required.

Key value for chemical safety assessment

Additional information