CAS 3618-43-7 appears in our catalog under these names: Xylenol Orange tetrasodium salt, ACS , Xylenol Orange tetrasodium salt, 0.1% w/v aq. soln. , Xylenol Orange tetrasodium salt, Xylenol orange, sodium salt, ACS reagent, Xylenol Orange, sodium salt, pure, water soluble. Offered by: Thermo Scientific (Alfa Aesar), Chemat, Biosynth, Thermo Scientific (Acros), Ambeed. Available pack sizes: 2g, 10g, 50g, 100ml, 1g, 25g, 5g, 0,25kg.