NILE CHEMICALS

THYMOL BLUE

SPECIFICATION SHEET

CAS No. 76-61-9
Chemical Formula C27H30O5S
Molecular Weight 466.60
Melting Point 221 - 224 c
Dye Content ~95%
Solution Clarity (EtOH) To pass
Transition Range pH 1.2 - 2.8 Red to Yellow
pH 7.8 - 9.5 Yellow to Blue
Absorptivity (pH 1.2) 543-547 nm 400 - 500
Absorptivity (pH 2.8) 431-436 nm 200 - 300
Absorptivity (pH 7.8) 431-436 nm 200 - 300
Absorptivity (pH 9.5) 594-598 nm 450 - 550
Loss On Drying (110 c) <3%

MSDS

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