chromotropic acid and its Impurities

Chromotropic acid is used for testing for the presence of formaldehyde. It is a chemical compound with the formula 2C10H42. It can be used for as a reagent in the quantitative determination of the herbicide 2,4-dichlorophenoxyacetic acid.. Reference standards of Chromotropic Acid API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below