An excess of acetylsalicylic acid is used in the first step, because it eliminates the possibility of unreacted carbonate anions precipitating the copper in this step.
22.
For example, the drug " acetylsalicylic acid " ( 2-acetoxybenzoic acid ) is better known as " aspirin " in the United States a generic term.
23.
A less corrosive compound of salicylic acid, acetylsalicylic acid, produced by reacting sodium salicylate with acetyl chloride, was developed from 1897 by Felix Hoffmann and Arthur Eichengr�n.
24.
On Aug . 10, 1897, Hoffman, a young researcher at Germany's Bayer chemical company, synthesized a stable form of the compound called acetylsalicylic acid, aspirin's active ingredient.
25.
It can also be prepared by the hydrolysis of aspirin ( acetylsalicylic acid ) or methyl salicylate ( oil of wintergreen ) with a strong acid or base.
26.
In 1897, pharmacist and chemist Felix Hoffmann managed to process acetylsalicylic acid ( ASA ) that was chemically pure and stable as well as well tolerated for patients.
27.
They each implied that they were superior to aspirin, which is acetylsalicylic acid _ which was synthesized by Felix Hoffmann, a Bayer chemist, on Aug . 10, 1887.
28.
One hundred years ago the foul-tasting bark extract was transformed by the young German chemicals industry into pure white tablets of acetylsalicylic acid _ launched by Bayer in 1899 as aspirin.
29.
Aspirin ( acetylsalicylic acid or ASA ) can be prepared by the esterification of the phenolic hydroxyl group of salicylic acid with the acetyl group from acetic anhydride or acetyl chloride.
30.
In 1897, scientists at the drug and dye firm Bayer began investigating acetylsalicylic acid as a less-irritating replacement for standard common salicylate medicines, and identified a new way to synthesize it.
