can't read?
3,5-Dinitrosalicylic acid it is mainly used in assay of alpha-amylase.
D 2215 (OTTO) 3,5-Dinitrosalicylic acid, 98% Cas 609-99-4 - used as a reagent for the preparation of oxazolines from amino alcohols and for the spectrophotometric determination of ampicillin.