Ichthyol

(ik'-the-ol) [ichthyo-; oleum, oil], i. The ammonium or sodium salt of a tarry substance obtained in the distillation of a bituminous mineral containing fossil fish. The chemic formula is C 2S H 36 S 3 6(HN 4 ) 2 , or C2sH 36 S 3 6 Na 2 . It contains about 15% of sulfur, and is used as an alterative and anti- phlogistic, especially in eczema, acne, lupus, and other dermal diseases. Internally it has been employed in rheumatism, syphilis, leprosy, tuberculosis, etc. Dose 10-30 gr. (0.65-2.0 Gm.) in 24 hours. 2. Ammonium ichthyol sulfonate, (NH 4 ) 2 C 28 H 3B S 3 6 , soluble in water, glycerol, and a mixture of alcohol and ether; freely miscible in oils. Dose as alterative 3-10 min. (0.2-0.65 Gm.) 3 times daily. Application, 5 to 50% ointment; 2% solution in gonorrhea. I. Albuminate. See .

Ichthalbin. I. Formaldehyd. See Ichtho- jorm. I., Lithium, Li 2 C 28 H 36 S 3 6 , a dark- brown mass used in 50% ointment. Syn., Lithium ichthyol sulfonate. I., Sodium. See

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