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CODE: km-350 Product name: Phenol red sodium salt CAS No: 34487-61-1 Molecular Formula: C19H13NaO5S Molecular Weight: 376.36 PH indicator range: 6.8(yellow)-8.4(red) Water-soluble test: qualified Loss on drying: 2.0% max. Residue on ignition: 17.0-21.0%