This section is from the book "A Text-Book Of Pharmacology, Therapeutics And Materia Medica", by T. Lauder Brunton. Also available from Amazon: A text-book of pharmacology, therapeutics and materia medica.
Reactions. - When heated, the salt fuses; at a higher temperature it chars, emits inflammable vapours having a benzoin-like odour, and finally leaves a black residue of an alkaline reaction, and imparting a crimson colour to a non-luminous flame. On mixing the aqueous solution with a dilute solution of ferric sulphate, a flesh-coloured precipitate is produced.
Dose. - 8-30 grains (0.5-2 gm.).
Uses. - It has been used as a remedy for gout and uric acid.