3,5-Diaminobenzoic acid function 3,5-Diaminobenzoic acid CAS 535-87-5 is an important chemical intermediate, which can be used to synthesize various pharmaceutical and dye products. For example, a series of yellow reactive dyes derived from it can be used not only as the dark yellow dye of chemicalbook, but also as the Yellow component of black dyes. For example, Reactive Orange 6R, one of the three primary colors of many reactive black, has a great market application prospect.