Ichthyol

(ik’-the-ol) [ixOvg, fish; oleum, oil]. I The ammonium or sodium salt of a tarry substance obtained in the distillation of a bituminous mineral containing fo il fish. The chemic formula is C28H36S306(XH4)2, or C28- HgpSgOgNa^ It contains about 15 per cent, of sulphur, and is used as an alterative and antiphlogistic, especially in eczema, acne, lupus, and other dermal diseases. Internally it has been employed in rheumatism, syphilis, leprosy, tuberculosis, etc. Dose gr. x-xxx (0.65-2.0) in 24 hours. 326