Product Short Description: METHYL RED pH INDICATOR SOLUTION Product Description: 3.53. 4a: Methyl Red is a sensitive indicator for titration of weak organic bases and ammonia. Dissolve 1 g of methyl red powder in 500 mL of 60% alcohol. Use 2 drops for 25 mL of liquid in a titration. Our Methyl Red (MR) Reagent is an indicator solution used to indicate the pH of the broth culture in the methyl red test.