Academic IELTS Reading Section SECTION 1 Salicylic acid This natural powdery substance has helped to ease the troubles of human life for centuries. A. The benefits of salicylic acid were first documented in the 5 Century BC, when the Greek physician Hippocrates noted how powder derived from the bark of the white willow tree (Salixalba) was capable of reducing fevers and relieving pain. Surviving evidence suggests that early civilisations across the Middle East and in North America also used willow bark for these purposes. It was not until 1826, however, that the active component of willow bark was finally distilled and given a name - salicin - by Johann Andreas Buchner, a German pharmacologist at the University of Munich. A few years later, the process of isolation was perfected and the Italian chemist Raffaele Piria completed the development of salicylic acid through a chemical conversion. By the end of the nineteenth century, the German company Bayer was successfully marketing the dr...
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