
Thymol Blue 1% w/v Aqueous Indicator by Exaxol, catalog number T70182-100, is a 1% w/v thymol blue indicator solution in water, changing from red to yellow at pH 1.2–2.8 and yellow to blue at pH 8.0–9.6. Available in 100 mL from MBP, a registered vendor to many research institutes across the USA.