2. Acidum Camphoricum, Camphoric Acid, C10h16o4, Official 1900-1910

Acidum Camphoricum, Camphoric Acid, Cho, Official -. This dibasic organic acid is obtained by oxidizing camphor 150 Gm. with hot nitric acid 2000 Ml. (Cc.), until crystallization takes place, dissolving crystals in water (5) containing sodium carbonate, allowing solution of sodium camphorate to crystallize, dissolving crystals in water (10), decomposing with hydrochloric acid, when camphoric acid crystallizes out. It is in colorless, odorless, monoclinic prismatic crystals, plates, acid taste, melting at 187° C. (369° F.), soluble in alcohol, ether, chloroform, fatty oils, water (125). Antihydrotic, antiseptic, intestinal disinfectant, anticatarrhal; bronchitis, catarrh, cystitis, night-sweats of phthisis, diarrhoea, sore throat, pyelitis, eczema, acne. Dose, gr. 5-30 (.3-2 Gm.); locally in 2-6 p. c. aqueous solutions, with 11 p. c. of alcohol to each 1 p. c. of acid.

3. Borneo, Sumatra, or Barus Camphor (Dryobal'anops aromat'ica {Camphora)), C10H18O, has different odor from official camphor, heavier than water, less volatile, with nitric acid yields ordinary camphor.

4. Ngai Camphor (Blu'Mea Balsamif'Era)

Ngai Camphor (Blu'Mea Balsamif'Era). This is a tall weed of India, China, Formosa. Its camphor has same composition as Borneo, but is laevorotatory, and natively is prized higher than our official.

5. Artificial Camphor

Artificial Camphor. Although this can be made by oxidizing camphene, C10H16, with chromic acid mixture, yet the more recent process is based upon the interaction of anhydrous turpentine and anhydrous oxalic acid at 120-130° C, (248-266° F.), resulting in giving borneol, borneol oxalate, borneol formate, camphor, and polymerization products; however, the products terpin hydrate and terpene hydrochloride are recognized generally under this name - the latter being prepared by saturating oil of turpentine, dissolved in twice its volume of carbon disulphide, with hydrochloric acid gas.

6. Oleum Camphoros, Camphor Oil, Official 1870-1880

Oleum Camphoros, Camphor Oil, Official -. This is a yellowish-brown volatile oil obtained from camphor by sublimation and expression; has camphor odor and taste, sp. gr. 0.940, dextrorotatory; contains pinene, phellandrene, cineol, dipentene, terpineol, safrol, eugenol, cadinene - at low temperature deposits camphor; used by Chinese for rheumatism, etc. Should not be confounded with official Linimentum Camphorae, which also often is called oil of camphor (Ger. Oleum Camphoratum). Allied Plants:

1. Nectan'Dra Rodice'I, Bebeeru Bark

Nectan'Dra Rodice'I, Bebeeru Bark. The dried bark, official 1860-1880; S. America, Guiana. Large tree, 18-24 M. (60-80°) high, bark ash-gray, smooth, leaves 12.5-15 Cm. (5-6') long, 5-7.5 Cm. (2-3') broad, coriaceous, shining; flowers yellowish-white, jasmine odor, wood strong (valuable in shipbuilding); fruit, subpyriform, 5-7.5 Cm. (2-3') long, bitter. Bark flat pieces 6 Mm. (1/4') thick, .3-.6 M. (1-2°) long, 10-15 Cm. (4-6') broad, many longitudinal depressions, inside cinnamon-brown, coarsely striate, fracture granular, with stone cells, astringent, bitter; contains beberine (identical with buxine, para-cine, and pelosine), siripine; wood has nectandrine. Used as tonic, antiperiodic, febrifuge; intermittents, menorrhagia, leucorrhoea, headache, neuralgia, dyspepsia, consumption, in infusion, decoction. Dose, 3ss-l (2-4 Gm.); beberine, gr. 1-10 (.06-.6 Gm.).