Description
 Xylenol Blue is a useful alternative to thymol blue developed in the 1920s.  Xylenol Blue can be used at half the concentration that thymol blue requires. It is functional at the same two pH ranges, acidic (pH 1-3), which transitions from red to yellow, and basic (pH 8-10), which transitions from yellow to blue.  Xylenol Blue may be substituted for any experiment that requires thymol blue. 
  Product Specifications:
 Xylenol Blue; 
 1,4-Dimethyl-5-hydroxybenzenesulfonphthalein 
 p-Xylenolsulphonephthalein 
  MOLECULAR BIOLOGY GRADE 
  C 23H22O5S 
  MW: 410.49 g/mol 
  Storage/Handling: Store desiccated at room temperature. 
 PubChem Chemical ID: 67172