Indigo Carmine (Caustic Blue) 0.1% w/v Aqueous Indicator, 100 mL

Indigo Carmine (Caustic Blue) 0.1% Indicator by Exaxol, catalog number SI4808-100, is a 0.1% w/v indigo carmine indicator solution in water, changing from blue at about pH 11.4 to yellow at 13.0. Available in 100 mL from MBP, a registered vendor to many research institutes across the USA.