Products / pH Indicators

METHYL RED (ACS GRADE) Print Download

C.A.S. No. 493-52-7
CI NO. 13020
M.F. C15H15N3O2
M.W. 269.31gm/mole

Specifications:

Dye Content (by Spectrophotometry) >95%
Transition Range pH 4.2-6.2
Pink-Yellow
Solubility 0.1% (95% EtOH) Clear solution
Absorption maximum (pH 4.2) ?1max 523-526nm
Absorption maximum (pH 6.2) ?2max 430-434nm
Absorptivity (A1%/1cm at pH 4.2 at ?1max) 1300-1400
Absorptivity (A1%/1cm at pH 6.2 at ?2max) 700-800
Loss On Drying (110°C) <3%
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