

Thymolphthalein 0.1% w/v in 50% Ethanol by Exaxol, catalog numbers T7022-100 and T7022-500, is a 0.1% w/v thymolphthalein indicator in 50% v/v ethanol, colorless below about pH 9.3 and blue above 10.5. Available in 100 mL and 500 mL from MBP, a registered vendor to many research institutes across the USA.

