Registration Dossier
Registration Dossier
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EC number: 231-887-4 | CAS number: 7775-09-9
Endpoint summary
Administrative data
Description of key information
Additional information
Several test with terrestrial organisms are available, but not all are relevant for the use of sodium chlorate registered under REACH.
Terrestrial bacteria were most sensitive to sodium chlorate. For nitrogen mineralization a NOEC of 0.333 g/kg can be used.
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.
The LC50 for soil dwelling organisms is greater than 750 mg/kg soil dw. Two worm species were tested Eisenia fetida and Lumbricus terrestris L.. For both species 50% effect was not reached.
Several short-term tests and one long-term test with birds were performed.
Two acute studies with Mallard ducks and one with Northern bobwhite quails were found. No effects were seen after 14 days and the NOAEL > 2510 mg/kg. Another test with Northern bobwhite chicks for a period of 5 days did not give mortality or clinical signs of toxicity The NOAEL amounted to 5620 ppm (approx 2500 - 1500 mg/kg bw/d, based on food consumption per day and body weight on day 0 and 5).
One chronic study was found with Colinus virginianus (Bobwhite quail) which gave a NOEC of 300 ppm (equal to 300 mg/kg food and 31.6 mg/kg bw/d).
Three valid studies with terrestrial plants were found. These tests were performed for pesticides application of sodium chlorate. For general use of sodium chlorate this is most likely not the way seeds or plants will be exposed. Therefore, no relevant endpoint was obtained for terrestrial plants.
Several studies were performed with arthropods. These were performed under the pesticed regulation and are not relevant for REACH.
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 1 (no adsorption expected of the substance in soil with log Kow <5; and not very toxic to aquatic organisms).
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