Tags: Chemical Compound, Chemical Substance.
Armstrong’s acid (naphthalene-15-disulfonic acid) is a strong acid which is related to toluenesulfonic acid and is used in chemical synthesis. It was named for British chemist Henry Edward Armstrong. It is sometimes used as a divalent counterion for forming salts of basic drug compounds as an alternative to the related mesylate or tosylate salts. When used in this way such a salt is called a naphthalenedisulfonate salt as seen with the most common salt form of the stimulant drug CFT.
