This section is from the book "Materia Medica Pharmacy, Pharmacology And Therapeutics", by W. Hale White. Also available from Amazon: Materia Medica Pharmacy, Pharmacology And Therapeutics..
A grayish-white powder, deliquescent, having a strongly alkaline reaction, and responding to the tests for Calcium and Potassium. Solubility. - In diluted hydrochloric acid without leaving more than a small residue.