Product Short Description: BROMOTHYMOL BLUE INDICATOR SOLUTION ( 0.04% soln.) Product Description: Bromothymol blue indicator sollution0.04 Combine 20 mL of alcohol to the sodium hydroxide/bromothymol blue solution. Dilute the mixture with 1 L of distilled water in a large container. The solution should be dark blue in color. If the solution appears green,use a pipette to slowly add sodium hydroxide drop by drop to the solution until it changes to blue.