Exaxol Sulfo Orange (Tropaolin O) 0.1% w/v Aqueous Indicator

Sulfo Orange (Tropaeolin O) 0.1% w/v Indicator by Exaxol, catalog numbers S6638-100 and S6638-500, is a 0.1% w/v sulfo orange (tropaeolin o) indicator solution in water, changing from yellow to orange at roughly pH 11 to 12.7. Available in 100 mL and 500 mL from MBP, a registered vendor to many research institutes across the USA.