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TETRABROMOPHENOLPHTHALEIN ETHYL ESTER POTASSIUM SALT CAS62637-91-6used in protein detection. Indicator for ion-pair extraction-titration
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Direct Blue CAS2429-74-5Mainly used for cotton, rayon and other cellulose fiber dyeing.
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Methylene Blue CAS61-73-4Used as chemical indicators, dyes, biological stains and drugs.