This section is from the book "A Text-Book Of Pharmacology, Therapeutics And Materia Medica", by T. Lauder Brunton. Also available from Amazon: A text-book of pharmacology, therapeutics and materia medica.
A volatile oil distilled from tar.
An almost colourless liquid when freshly distilled, but soon acquiring a dark, reddish-brown colour, having a strong tarry odour and taste, and an acid reaction. Specific gravity about 0.970. It is readily soluble in alcohol.
Use. - It is used, dissolved in water or in alcohol, as an external application in skin diseases.