On storax so treated, the seller allows 16 per cent of tare. It is shipped to Constantinople, Smyrna, and Bombay, and reaches the western commerce by way of Trieste. The residual bark from which storax is removed by pressure, is also an object of commerce under the name of Cortex thymiamati . Era , Vol. Description and Tests.
Storax is heavier than water.
It is sometimes adulterated with mineral matters, resin, turpentine, etc. The British Pharmacopoeia and the German Pharmacopoeia direct that storax be purified by alcohol previous to its being used medicinally. The residual storax passed through the cloth, leaving caoutchouc and resin. This dissolved part of the storesin and all of the free cinnamic acid. The former was precipitated from the solution by carbonic acid gas, then the latter by hydrochloric acid.