Registration Dossier

Diss Factsheets

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

Several test with terrestrial organisms are available, and most of them were performed on sodium chlorate as read-across approach.  


Terrestrial bacteria were most sensitive to sodium chlorate. For nitrogen mineralization a NOEC of 0.333 g/kg can be used.


One key study valid was found in sodium chlorate for evaluated short-term toxicity of soil macroorganism Eisenia fetida (Haque 1983, with an artificial soil test which resembles at OECD Guideline 207). This last shows no mortality for all test concentration, so the LC50 was greater than 750 mg a.i./kg dw.


No data are available on terrestrial arthropods.


One supporting study (Carillo, 1996) with terrestrial plants is available on buffered preparation of chlorine dioxide. This study suggests that chlorine dioxide-treated drinking water can be considered safe for growing plants.


No key study valid was found in chlorite for birds but two key studies valid were found in Sodium chlorate for evaluated toxicity to birds bobwhite quail Colinus virginianus or mallard duck Anas platyrhynchos (Arch 2004, according to OECD Guideline 206 and Fink 1990, according to EPA OPP 71 -1). These studies demonstrated a NOEC (154 days) = 300 ppm of sodium chlorate in bobwhite quail (Arch 2004) and a LD50 (14 days) > 2510 mg/kg of sodium chlorate in mallard duck (Fink 1990).


According to section R.7.11.5.3., Chapter R.7c of the ECHA Guidance on information requirements and chemical safety assessment (version 3.0, June 2017), the registered substance should be classified as a soil hazard category 2 (no adsorption expected of the substance in soil with log Kow <5; and EC/LC50< 1 mg/L for fish and invertebrates).