Universal indicator color charts are used to determine the pH of a solution. These handy charts display the colors and pH values an indicator would create for each pH unit from 3 to 10. The charts are also available as an overhead transparency, 8.5×11? sheet (IS5098) and smaller chart cards (IS5099). Laminated 8 1/2? x 11? Universal Indicator pH Color Chart For use with: IS30000 Universal Indicator Solution 500 mL IS30002 Universal Indicator Solution 25 mL DOT Info: Non-regulated