Salicylic acid is a white crystalline slightly water-soluble substance with a sweet taste and bitter aftertaste. It is used in the manufacture of aspirin, dyes, perfumes and as a fungicide. C6H4(OH)COOH is its chemical formula.
The Italian chemist Raffaele Michele Rocco Piria discovered salicylic acid after isolating it from salicin in 1838. Here is the method he used to isolate salicylic acid:
- He subjected salicin to sulphuric acid and potassium chromate and obtained an oily substance.
- He then added chlorine to this oily product and obtained hydrochloric acid along with some colourless crystals.
Here is a photograph of salicylic acid crystals:
[ux_image_box img=”1136″ image_width=”50″ link=”https://de.wikipedia.org/wiki/Salicylsäure” target=”_blank”]
Here is a photograph of Raffaele Piria:
[ux_image_box img=”1139″ image_width=”50″ link=”https://it.wikipedia.org/wiki/Raffaele_Piria” target=”_blank”]