A condensation product of birch tar and formaldehyde.
Actions and Uses.—Empyroform is an antipruritic, sedative and desiccant. It is said to be superior to tar and free from irritant or toxic effects. It is claimed to be useful in all stages of eczema, psoriasis, lichen, urticaria, prurigo, pityriasis, etc. Dosage.—It is applied as a 5 to 10 per cent. ointment, 10 to 20 per cent. zinc paste, 10 to 20 per cent. tincture, and 37·5 per cent. suspension. Manufactured by Chemische Fabrik auf Actien, vorm. E. Schering Berlin (Schering & Glatz, New York).