Compound Benzoin Tincture
» Prepare Compound Benzoin Tincture as follows.
Prepare a Tincture by Process M (see Pharmaceutical Dosage Forms 1151), using alcohol as the menstruum.
Packaging and storage Preserve in tight, light-resistant containers, and avoid exposure to direct sunlight and to excessive heat.
Labeling Label it to indicate that it is flammable.
Specific gravity 841: between 0.870 and 0.885.
Limit of nonvolatile residue Evaporate 3 mL of Tincture in a suitable tared dish on a steam bath, and dry the residue at 100 for 2 hours: the weight of the residue is between 525 mg and 675 mg.
Alcohol content, Method II 611: between 74.0% and 80.0% of C2H5OH, the dilution to approximately 2% alcohol being made with methanol instead of with water.