American Journal of Pharmacy Volume 9 (Paperback)

Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: Absolute cresylic acid is miscible with Price's glycerin in all proportions. A mixture of one volume of glycerin and one of cresylic acid is completely precipitated by one volume of water. Creasote is insoluble in Price's glycerin, whether it be added in the proportion of one, two or three volumes for one of creasote. The sample of Price's glycerin used for the above experiments was found to have a density of I'258. 10. textit{Behavior with Collodion. Absolute carbolic or cresylic acid, when shaken with half its measure of textit{Cillodium, B. P., precipitates the nitrocellulose in a transparent gelatinous form, very difficult'to see. It is best observed by inclining the tube and causing the liquid to flow gently from one end to the other. Creasote does not precipitate the nitrocellulose from collodion, but mixes perfectly with its etherial solution. Addition of much creasote to a mixture of collodion and carbolic or cresylic acid causes the re-solution of the precipitated nitre-cellulose. 11. textit{Reaction with Ferric Chloride. The addition of one drop of a 10 per cent, aqueous solution of ferric chloride to 15 cc. of an aqueous solution of cresylic or carbolic acid causes a permanent violet-blue coloration. When creasote is similarly tested a blue color results, which almost instantly changes to green and brownish-yellow. Other distinctive tests for creasote and carbolic acid are to be found in the books, but are almost worthless in practice. Thus the reactions with bromine, sulphuric acid and nitric acid are far too much alike to be of service for distinguishing between these bodies. It has been stated that creasote differed from carbolic acid in its power of rotating a ray of polarized light. I redistilled a sample of Morson's creasote to obtain it colorless, and...