(chemistry) The salt of sodium and citric acid with the chemical formula Na₃C₆H₅O₇ and used primarily as a food additive.

(physics) The only stable isotope of sodium, ²³₁₁Na, having eleven protons and twelve neutrons

(chemistry) The unstable sodium salt of hypochlorous acid, NaOCl, used as a bleach and a fungicide.

Alternative spelling of sodium sulfate

(inorganic chemistry) The sodium salt of sulfuric acid, Na₂SO₄; it is a mild laxative (as Glauber's salt), and is used in the manufacture of paper, detergents and many other products.

(inorganic chemistry, pharmacology) A poisonous crystalline salt NaF that is used in trace amounts in the fluoridation of drinking water and toothpastes, in metallurgy, as a flux, and as a pesticide.

A photosensitizer used in photodynamic therapy and radiation therapy and for palliative treatment of certain lung carcinomata and obstructing esophageal cancer.

Alternative spelling of metham sodium

A soil fumigant, the sodium salt of methyldithiocarbamate, used as a pesticide, herbicide, and fungicide.

A particular kind of drug that is used to treat cerebrovascular and cardiovascular diseases.