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3172-49-4 2-(6h-6-oxo-3,4,5-trihydroxyxanthen-9-yl)benzenesulphonic acid

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Product Name 2-(6H-6-oxo-3,4,5-trihydroxyxanthen-9-yl)benzenesulphonic acid
CAS No. 3172-49-4
Synonyms pyrogallolsulphonephthalein