(inorganic chemistry) The inorganic compound Na₂S₂O₅, used as a food preservative, in photography and in many industrial applications

Alternative spelling of sodium metabisulfite

(inorganic chemistry) The sodium salt of hydrobromic acid (chemical formula NaBr)

(inorganic chemistry) The sodium salt of chloric acid (chemical formula NaClO₃).

(inorganic chemistry) The sodium salt of hydrocyanic acid, NaCN.

Alternative spelling of sodium sulfide

(inorganic chemistry) The inorganic compound Na₂S.

Alternative spelling of sodium bisulfate

(inorganic chemistry) The inorganic compound NaHSO₄, used primarily to lower pH.

(pharmacology) A synthetic compound C₅₁H₃₄N₆Na₆O₂₃S₆ derived from urea, obtained as a white powder and administered intravenously to treat early stages of African sleeping sickness, onchocerciasis, and filariasis.