A Treatise on Pharmacy (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1884 Excerpt: ... even more so than mauy coloring acids. Most of those which follow arc precipitated by acetate or sulwoetate of lead, and may be obtained in a free state by decomposing sueh precipitates, diffused in alcohol, by sulphuric acid or sulphuretted hydrogen. Compounds may be formed with alumina, if their mixture with a solution of alum is precipitated by ammonia; such colored precipitates are called lakes. (a) Acids from Phcenogamic Plants. Carthamic acid, CuH160-, carthamin. In C'arthamus tinctorius; amorphous; carmine red, with a green metallic lustre; little soluble in water; soluble in alcohol. Carthaxanthic acid, C2)H30O15. Yellow extract; soluble in water; brown in contact with air. Crock acid, CitHaOsl, polychroite. In saffron, and in the fruit of Gardenia grandiflors; brilliantly red; by HNO, green, by IlySO, indigo-blue (tests for saffron); soluble in water, more in alkalies, by hot diluted acids split into crocetin, C21H.aO, and su-ar. Botlleric acid, Chhuoj, roitkrin. In the hairy covering of the fruit of Rotllera line toria; brilliant yellow crystals; red by alkalies. Chrymphanic acid, C' 0II8O3. In senna, rhubarb, etc.; boracic acid does not turn it brown. (See also Rhamnin.) Xanthorhamnk acid, C.aHMOu. In the fruit of Rhamnus tinctoria; crystalline: readilr soluble in water and hot alcohol; insoluble in ether; by boiling with dilute acids yields rhamnetin, C22IIloOI0, and sugar. (See Qucrcitric Acid.) ffliamnoxanlhic acid, C2H1206, frangulin. In the root and bark of Rhamnus frangula; lemon-yellow crystalline powder; insoluble in water and ether; soluble in ItiO parte hot alcohol; in H, SO( with a ruby, in alkalies with a purple color. Loao or Chinese green is the Al2Oj compound of Rhamnus chlorophorus and ulilk Sap green is prepared from the un...