Products / pH Indicators

TROPAEOLIN O Print Download

C.A.S. No. 547-57-9
CI NO. 14270
M.F. C12H9N2SO5Na
M.W. 316.27gm/mole

Specifications:

Solubility 0.1% (Dist. water) Clear solution
Transition range pH 11.2-12.7
Yellow-Orange
Absorption maximum (0.1N NaOH) ?max 488-493nm
Absorptivity (A1%/1cm in 0.1N NaOH, at ?max) >550
Loss on drying (110°C) <5%
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