Yana da farin da zaki da iko tare da takamaiman nauyi na 7.1 da narkewar batu 820 ℃ Zai iya narke a cikin nitric acid. zafi maida hankali sulfuric acid, ammonium acetate da sodium acetate, amma ba a cikin ruwa. Yana juya zuwa vellow lokacin da ya rasa crystal ruwa a 135 ℃. Yana kuma juya zuwa rawaya karkashin hasken rana musamman a rigar.