Exaxol Phenolphthalein 1% w/v in 70% Alcohol (IPA)

Phenolphthalein 1% in 70% Isopropanol by Exaxol, catalog numbers P6169-100, P6169-500, and P6169-1, is a 1% w/v phenolphthalein indicator solution in 70% isopropanol, changing colorless below about pH 8.2 and pink above 10. Available in 100 mL, 500 mL, and 1 L from MBP, a registered vendor to many research institutes across the USA.