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Description
Catalogue Number	103025
Synonyms	5′,5”-Dibromo-o-cresolsulfonphthalein

Physicochemical Information
Melting Point	242 °C
Bulk density	515 kg/m3

Safety Information according to GHS
Storage class	10 – 13 Other liquids and solids
WGK	WGK 3 highly hazardous to water
Disposal	3 Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.

Storage and Shipping Information
Storage	Store at +2°C to +30°C.

Specifications
Identity (UV/VIS-Spectrum)	passes test
Clarity of solution (1 g/l; ethanol)	passes test
Transition range	pH 5.2 – pH 6.8 greenish yellow – blue violet
Absorption maximum λ 1 _max. (buffer pH 5.2)	429 – 433 nm
Absorption maximum λ 2 _max. (buffer pH 6.8)	587 – 590 nm
Spec. Absorptivity A 1%/1cm (λ 1 _max.; 0.005 g/l; buffer pH 5.2; calc. on dried substances)	400 – 470
Spec. Absorptivity A 1%/1cm (λ 2 _max.; 0.005 g/l; buffer pH 6.8; calc. on dried substances)	1000 – 1160
Loss on drying (110 °C)	≤ 2 %
Transition range (according to ACS)	passes test
Sensitivity test	passes test

Merck 103025 0025 Bromocresol Purple indicator 25 GR.