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Phenol red, indicator, ACS

- Synonyms: Phenolsulfonphthalein, PRr- C19H14O5Sr- M = 354,38 g/molr- CAS [143-74-8]r- EINECS-No.: 205-609-7r- Solub. in water: (20 ºC): almost insolubler- Tariff number: 2934 99 90 90r- Applications: analytical chemistry, indicator.rrSPECIFICATIONSrpH range (yellow-red): 6,8 - 8,2 rclarity of solution: passes testrAbsorption maximum l1 (pH 1,2): 503 - 506 nm rAbsorption maximum l2 (pH 3,0): 430 - 435 nmrAbsorption maximum l3 (pH 6,5): 430 - 435 nmrAbsorption maximum l4 (pH 8,8): 557 - 560 nm rAbsorptivity (A1%/1 cm; l1, on dried sample): 900 - 1100 rAbsorptivity (A1%/1 cm; l2; on dried sample): 500 - 700 rAbsorptivity (A1%/1 cm; l3 , on dried sample): 500 - 700 rAbsorptivity (A1%/1 cm; l4 , on dried sample): 1000 - 1200 rinsoluble in C2H5OH : passes testrcopper (Cu): max. 0,005 %riron (Fe): max. 0,005 %rlead (Pb): max. 0,005 %rnickel (Ni): max. 0,005 %rloss on drying (110 ºC): max. 5 % r