Sudan I-OVA is a hapten-carrier protein conjugate formed by coupling Sudan I to chicken ovalbumin (OVA). As a hapten, Sudan I alone cannot induce an immune response and must be conjugated to a large molecular protein to become a complete antigen with immunogenicity.Sudan I-OVA may be supplied as a lyophilized powder or as a solution. The solution is prepared in 0.01 M TBS (pH 7.4) buffer at a typical concentration of 1 mg/mL.