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Indigo Carmine, 93% (Dye Content), 125g For Research & Development Not for drug, human, animal, or food use Certificate of Analysis: Appearance (Color) Dark purple Appearance (Form) Powder Purity (Dye Content) 93.0% Purity (Elemental Analysis) (C) 45.4% (N) 6.9% Infrared Spectrum Conforms to structure Maximum UV Absorption 615nm >19000, 290nm >29500, 256nm >20000 Suitable for use in histology Suitable for us as pH indicator 11.5-14.0 CAS: 860-22-0 FORMULA: C16H8N2Na2O8S2
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