4/12/2023 0 Comments Salicylic acid molar massThe Cherokee and other Native Americans used an infusion of the bark for fever and other medicinal purposes for centuries. This remedy was also mentioned in texts from ancient Sumer, Lebanon, and Assyria. The Greek physician Hippocrates wrote in the 5th century BC about a bitter powder extracted from willow bark that could ease aches and pains and reduce fevers. This tris(chelate) complex forms more readily in basic solution. Salicylic acid is an enol of an β-ketocarbonic acid and therefore forms purple complexes with iron(III) salts: It can be prepared by the hydrolysis of Aspirin (acetylsalicylic acid) or methyl salicylate (Oil of Wintergreen) with a strong acid or base. Acidification of the product solution gives salicylic acid: Sodium salicylate is commercially prepared by treating sodium phenoxide with a high pressure of carbon dioxide at high temperature via the Kolbe-Schmitt reaction. Salicylic acid is biosynthesized from the amino acid phenylalanine. SA is the calorigenic substance that causes thermogenesis in Arum flowers. It is involved in the systemic acquired resistance in which a pathogenic attack on older leaves causes the development of resistance in younger leaves, though whether SA is the transmitted signal is debatable. SA is recognized as an endogenous signal, mediating in plant defense, against pathogens It plays a role in the resistance of pathogens by inducing the production of 'pathogenesis-related proteins'. Salicylic acid (SA) is a phytohormone and a phenol, ubiquitous in plants generating a significant impact on plant growth and development, photosynthesis, transpiration, ion uptake and transport and also induces specific changes in leaf anatomy and chloroplast structure. It is probably best known as a compound that is chemically similar but not identical to the active component of aspirin. It is derived from the metabolism of salicin. This colorless crystalline organic acid is widely used in organic synthesis and functions as a plant hormone. Salicylic acid (from the Latin word for the willow tree, Salix, from whose bark it can be obtained) is a beta hydroxy acid (BHA) with the formula C 6H 4(OH)CO 2H, where the OH group is adjacent to the carboxyl group. Methyl salicylate, Benzoic acid, Phenol, Aspirin, 4-Hydroxybenzoic acid, Magnesium salicylate, Bismuth subsalicylate (Pepto Bismol), Sulfosalicylic acidĮxcept where noted otherwise, data are given for materials in their standard state (at 25 ☌, 100 kPa) Infobox disclaimer and references
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