Page:The British pharmacopœia.djvu/530

496 Solution of Ferricyanide of Potassium. It gives an intensely blue precipitate with ferrous salts, but none with ferric salts. It is used with the following substances:


 * Ferri Arsenias
 * Carbonas Saccharata
 * Phosphas
 * Sulphas
 * Exsiccata
 * Granulata

Solution of Litmus. It gives a red colour with acids and a blue colour with alkalies. It may be used with the following substances:—


 * Acidum Hydrochloricum
 * Dilutum
 * Nitricum
 * Dilutum
 * Nitro-hydrochl. Dil.
 * Sulphuricum
 * Arom.
 * Dil.
 * Ammonii Carbonas
 * Borax
 * Liquor Ammoniæ
 * Fortior
 * Calcis
 * Saccharatus
 * Potassæ
 * Effervescens
 * Sodæ
 * Effervescens
 * Potassa Caustica
 * Potassii Bicarbonas
 * Carbonas
 * Citras
 * Tartras
 * Acida
 * Soda Caustica
 * Tartarata
 * Sodii Bicarbonas
 * Carbonas
 * Carbonas

Solution of Yellow Chromate of Potassium. It gives a red colour with nitrate of silver, but not until any soluble bromide or iodide present is entirely decomposed. It may be used with the following substances:—


 * Ammonii Bromidum
 * Potassii Bromidum
 * Potassii lodidum
 * Sodii Bromidum
 * Sodii Iodidum

Tincture of Phenol-Phthalein. It gives an intense red colour with potash or soda, It may be used with the following substances:—

Tartaricum
 * Acetum
 * Acidum Aceticum
 * Dilutum
 * Glaciale
 * Citricum