One hundred c.c. contain 7 gm. iodin and 5 gm. potassium iodid dissolved in alcohol. This preparation is quite dissimilar to that formerly official in the U. S. P. or the international standard preparation generally prescribed in Europe, as it contains potassium iodid. The U. S. P. tincture of iodin has the advantage of being more stable so far as iodin content is concerned and of being miscible with water.

Dosage: 0.1 c.c. or 1 minims.