Phenacetin powder, compound

Ethoxyacetanilide. This compound (22), also known as phenacetin, is a white crystalline powder. The compound is odorless and has a slightly bitter taste. It is sparingly soluble in cold water and more soluble in hot water, ethanol, diethyl ether, and chloroform. At relative humidities between 15 and 90% the equiUbtium moisture content is about 2% (25°C). 

Compound Tablets of Aspirin and Dover s Powder, B.P.C. Contain 3 grains of aspirin, 11 grains of phenacetin and 1 grain of Dover s pow der. 

Assayed by the method given under Compound Tablets of Aspirin using 0 25 g of powdered tablets (p. 12), without extracting for salicylic acid, i.e. hydrolyse the mixture in acid solution, extract the caffeine with chloroform, reconvert the p-phenetidine into phenacetin, extract and weigh. 

---