Sodium antimonate RS-FN is a white powder exhibiting exceptional thermal stability, remaining undecomposed even

at temperatures up to 1000。C. It is soluble in tartaric acid, sodium sulfide solution, and concentrated sulfuric acid;

slightly soluble in alcohol and ammonium salt solutions; but insoluble in acetic acid, dilute alkalis, dilute mineral acids,

and cold water. Notably, it undergoes hydrolysis in hot water (approximately 100。C), forming colloidal precipitates.