ICHTHYOL

n. I"k'thi!I-o!1l. Lat, ichthyoleum (from ix^. a fish, and oleum, oil). Fr., i. Ger., /. It., ittiolo. Sp., ictiol. S.vn.: sodium ichthyolsulphonatf (2d def.). 1. A transparent, yellow brown oil, of sea-green fluorescence, prepared by distillation from a bituminous shale found in the Tyrol, containing semi-fo ilized remains of fishes; introduced into dermatological practice by Unna in 1882. It has been used externally in rheumatism, and internally in rheumatism, innutrition, eczema, etc., and as a discutient. 2. A sulphurated product of i. (1st def.), C28H3,S3Na2Oe, the disodic salt of fsulphonic acid, used as a local application in skin diseases where sulpnur is indicated, and regarded as equivalent to a 10-percent, sulpnur ointment. [Baumann and Schotten " Monatschr. f. prakt. Dermatol.," 1883, 1, 9; " N. Y. Med. Jour.," Jan. 9, 1886. p. 5C; "Pharm. Jour, and Trans.," Apr. 17, 1886; "Therap. Gaz.," May, 1886, p. 342.] I's ulphonic acid. Ger., I \iulfonsdure. An acid, Ca8H38S3O, derived from i. (1st def.). I. (2d def.) is its disodic salt. IB.] [s. 428]