Products / pH Indicators

METHYL ORANGE (ACS GRADE) Print Download

C.A.S. No. 547-58-0
CI NO. 13025
M.F. C14H14N3SO3Na
M.W. 327.34gm/mole

Specifications:

Dye Content (by Spectrophotometry) >95%
Solubility 0.1 % (Dist. water) Clear solution
Transition Range pH 3.1-4.4
Pink Orange-Yellow
Absorption maximum (pH 3.1) ?1max 501-504nm
Absorption maximum (pH 4.4) ?2max 467-471nm
Absorptivity (A1%/1cm at pH 3.1 at ?1max) 1050-1150
Absorptivity (A1%/1cm at pH 4.4 at ?2max) 750-850
Loss On Drying (110°C) <3%
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