Product Short Description: Methyl Red ACS Product Description: Product Application: Products : Methyl Red ACS Reag Ph. Eur , pH indicator C.I. No. : 13020 C15H 15N3O2 : M.W. 269.30 Absorption maxima : 1 (pH 4.5) : 523-526 nm 2 (pH 6.2) : 427-437nm Clarity of alcohol solution : passes test : Absorptivity (on dried sub.) : (A 1 % 1cm at 1max pH 4.5) : 1330 -1430 (A1 %1cm at 2max ph 6.2) : 700 - 800 Visual transition : From pH 4.2 pink interval : to pH 5.5 orange : to pH 6.2 yellow Melting point : 179 -182 oC Loss on drying (at 1100C) : Max. 5.0% :