Product Short Description: HABA FOR AUTOMATIC ANALYSIS Product Description: HABA dye (4'-hydroxyazobenzene-2-carboxylic acid) is a reagent that enables quick estimation of the mole-to-mole ratio of biotin to protein in a solution. ... The change in absorbance relates to the amount of biotin in the sample by the extinction coefficient of the HABA-avidin complex. HABA dye (4'-hydroxyazobenzene-2-carboxylic acid) is a reagent that enables quick estimation of the mole-to-mole ratio of biotin to protein in a solution. ... The change in absorbance relates to the amount of biotin in the sample by the extinction coefficient of the HABA-avidin complex. HABA dye (4'-hydroxyazobenzene-2-carboxylic acid) is a reagent that enables quick estimation of the mole-to-mole ratio of biotin to protein in a solution. ... The change in absorbance relates to the amount of biotin in the sample by the extinction coefficient of the HABA-avidin complex. HABA dye (4'-hydroxyazobenzene-2-carboxylic acid) is a reagent that enables quick estimation of the mole-to-mole ratio of biotin to protein in a solution. ... The change in absorbance relates to the amount of biotin in the sample by the extinction coefficient of the HABA-avidin complex.