1.1 INTRODUCTION, DEFINITION AND BACKGROUND OF STUDY
Aspirin can be defined as an analgesic drug made from a willow barks as a fever fighter. The leaves and the bark of the willow tree contain a substance known as Salicin. Salicin is a naturally occurring compound similar to acetyl salicylic acid. Aspirin, (Edward Stone, 1996).
In the laboratory, one can synthesis aspirin a derivative of salicylic acid. It is antipyretic because it lowers the body temperature of a person that has fever. The compound has little effect if the body temperature is normal. Salicylates are mild analgesic that relieves pains associated with headaches, (Neuralgia – a pain that is felt along a nerve usually in the head or face) and rheumatism (a disease that makes the muscles and joints painful, stiff and swallowed, (Oxford Dictionary, 6th edition).
Aspirin for more than hundred years now has been used as a pain reliever for many diseases. Americans consumed over 20 billion tablets a year. The most commonly salicylic used in medicine today is aspirin. In this research work, aspirin was prepared from Salicylic acid and acetic anhydride.
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