A stearoptene (concrete volatile oil), obtained from the wood of Cinnamomum Camphora (Camphora officinarum). Imported in the crude state from China and Japan, and purified by sublimation.

Characters. - White, translucent, tough, crystalline lumps; has a power-fill penetrating odour, and a pungent taste followed by a sensation of cold; floats on water; volatilises slowly at ordinary temperatures.

Solubility. - Is slightly soluble in water, but readily soluble in rectified spirit and in ether.

Composition. - A stearoptene having the formula C10H16O, and yielding camphoric acid on oxidation.

Impurities. - Fixed salts.

Test. - Sublimes entirely when heated.

Dose. - 1 to 10 grains.

Preparations containing Camphor.

B.P.

Dose.

Aqua Camphorae (saturated aqueous solution)........

1-2 fl. oz.

Linimentum Aconiti (vide p. 516) ................................................

" Belladonnae (vide p. 516) .........................................

Linimentum Camphorae (vide p. 516) ..........................................

" " Compositum (rule p. 516)..............................

Linimentum Chloroformi (vide p. 516).........................................

" Hydrargyri (vide p. 516) ..................................

" Opii (vide p. 516) .....................................................

Linimentum Saponis (vide p. 516) ..............................................

Linimentum Sinapis Compositum (vide p. 516) ............................

Linimentum Terebinthinae (vide P. 516).......................................

" " Aceticum (vide p. 516) ..............................

Spiritus Camphorae (camphor 1, rectified spirit 10) ......................

10-30 min.

Tinctura Camphorae Composita (vida Opium) .............................

15 min.-l fl. dr.

Unguentum Hydrargyri Compositum ..........................................

The hypodermic injections of apomorphine and ergot contain camphor water.

U.S.P.

Dose.

Aqua Camphorae ............................................................................

1 fl. dr.

Linimentum Belladonnae (vide p. 517) .........................................

" Camphorae (vide p. 517) .........................................

" Chloroformi (vide p. 517) ........................................

" Saponis (vide p. 517) .............................................

Spiritus Camphorae...............................................

5-10 min.

Tinctura Opii Camphorata.....................................

1-2 fl. dr.

Ceratum Camphorae...............................................

Aqua Camphorae. Camphor Water, B. and U.S.P. - It is prepared according to the B.P. by tying crushed camphor, 1/2-oz., in a muslin bag, which is kept immersed in 1 gallon of water in a bottle for at least two days. The U.S.P. directs camphor (8) to be dissolved in alcohol (16), and then added to cotton (16). After the alcohol has nearly evaporated the cotton is packed in a percolator, and distilled water poured on till 1,000 parts are obtained.