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Product : Orcein C.A.S. No. :1400-62-0 Specifications: Solubility 0.1 %(0.1N NaOH) = Clear solution Absorption Maximum (0.1N NaOH) ?max = 574-580nm Absorptivity (A1%/1cm in 0.1N NaOH, at ?max) = 250-450 Loss on drying (110�°C) =