Pyroxylinum Ordinary cotton fiber treated with strong fuming nitric acid, the cellulose, CfiH10O3, being changed to trinitro-cellulose, CsH.OjXOj3. It is soluble in ether, and is highly explosive by percussion. Collodium, contains pyroxylin 4, ether 70, alcohol 26. Solution should be complete. C. cum cantharide desiccans, B. P., flexible collodion 85, cartharides 60, chloroform, q. s. C. flexile, flexible collodion contains collodion 92, Canada turpentine 5, castor-oil 3 parts. C. stypticum, styptic collodion, tannic acid 2,alcohol 5 ether 25, collodion q. s. ad. 100.
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