Azo Dye Testing

Azo Dye Testing is a chemical test to determine whether products such as textiles, leather, and toys contain azo dyes that can decompose into carcinogenic aromatic amines. EU REACH Regulation Annex XVII Entry 43, China GB 18401, and other regulations strictly restrict such dyes. Usage scenarios: Textiles, clothing, footwear, and leather goods exported to the EU must provide azo test reports; buyers typically require suppliers to have testing conducted by ISO 17025-accredited laboratories and issue reports compliant with the EN 14362 standard. Precautions: The test targets 24 specific aromatic amines with a limit of 30 mg/kg; not all azo dyes are carcinogenic—only some can decompose into carcinogenic amines; test reports are usually valid for 1 year, but retesting is required if materials or processes change. Differences from other terms: Azo testing is different from formaldehyde testing, pH testing, and heavy metal testing—it is an independent chemical safety item; it also differs from 'AZO Free' certification, which is a self-declaration, whereas testing is third-party verification. Foreign trade professionals must ensure reports are authentic and cover all required items to avoid returns or recalls due to non-compliance.