Product Notes

 

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%
  :  

 

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