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Bromothymol blue, indicator, ACS

- Synonyms: 3',3''-Dibromothymol-sulfonphthalein, BTBr- C27H28Br2O5Sr- M = 624,40 g/molr- CAS [76-59-5]r- EINECS-No.: 200-971-2r- Solub. in water: (20 ºC): insolubler- Tariff number: 2934 99 90 90r- Applications: analytical chemistry, indicator.rrSPECIFICATIONSrpH range (yellow to blue): 5,8 - 7,6 rAbsorption maximum l1 (pH 5,8) : 430 - 435 nmrAbsorption maximum l2 (pH 7,6) : 615 - 618 nmrAbsorptivity (A1%/1 cm; l1; pH 5,8 on dried sample): 260 - 300 rAbsorptivity (A1%/1 cm; l2; pH 7,6 on dried sample): 470 - 520 rtransition range acc. ACS : passes testrloss on drying (110 ºC): max. 3 %r