


Thymolphthalein TS (USP) by Exaxol, catalog numbers T7019-100, T7019-500, and T7019-1, is a USP TS thymolphthalein indicator solution in alcohol, changing colorless below about pH 9.3 and blue above 10.5. Available in 100 mL, 500 mL, and 1 L from MBP, a registered vendor to many research institutes across the USA.


