NILE CHEMICALS

BROMOTHYMOL BLUE

SPECIFICATION SHEET

CAS No. 76 - 59 - 5
Chemical Formula C27H28Br2O5S
Molecular Weight 624.40
Melting Point 200 - 202 c
Dye Content ~95%
Solution Clarity To pass
Transition Range pH 5.8 - 7.6
Yellow - Blue
Absorption Max (pH 5.8) 430 - 435 nm
Absorption Max (pH 7.6) 615 - 618 nm
Absorptivity (1%/1cm) pH 5.8 260 - 300
Absorptivity (1%/1cm) pH 7.6 470 - 520
Loss On Drying (110 c) < 3%

Also Available Bromothymol Blue Sodium Salt Cas no 34722-90-2

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