This section is from the book "Dental Medicine. A Manual Of Dental Materia Medica And Therapeutics", by Ferdinand J. S. Gorgas. Also available from Amazon: Dental Medicine.
Actol occurs in the form of a white, tasteless, and inodorous powder, soluble in water, and is recommended as a surgical antiseptic and germicide. It is used as a hypodermic injection in erysipelas; as a wash, a teaspoonful of the solution (1.50) to a glass of water. An aqueous solution (1.100) will destroy all pathogenic microbes within five minutes.
Dr. Harlan states that he has used actol in suppurating pockets on the sides of roots of teeth with excellent results.
It will stain the cementum, but such stains are as easily removed as those from nitrate of silver. Actol causes no pain when used as strong as a twenty per cent. solution.