Tartrazine: Solid-Phase Radioimmunoassay Studies of an Azo Dye Implicated in Allergic Reactions (Azo Dyes and Allergy)

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Abstract
A solid-phase radioimmunoassay procedure was adapted for the haptenic study of tartrazine, an azo dye implicated in various forms of allergy. The haptenic relationship of tartrazine and aspirin was investigated, since sensitivity of individuals to the 2 substances is often clinically associated. The specificity of [rabbit] antibody to tartrazine was directed strongly toward a pyrazolone intermediate of the molecule, 1-(4-sulfophenyl)-3-carboxy-5-hydroxy-pyrazole. Aspirin did not cross-react with anti-tartrazine, suggesting that the clinical association of aspirin and tartrazine sensitivity in patients is a nonimmunological phenomenon.

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