Indicator

pH Range

Alizarin Red S 4.6 (yellow) - 6.0 (red)
Bromcresol Green 4.0 (yellow) - 5.6 (blue)
Bromcresol Green / Methyl Red 4.6 (pink) - 5.2 (green/blue)
Bromcresol Purple 5.2 (yellow) - 6.6 (purple)
Bromphenol Blue 3.0 (yellow) - 4.6 (blue)
Bromthymol Blue 6.0 (yellow) - 7.6 (blue)
Chlorophenol Red 5.2 (yellow) - 6.8 (red)
Congo Red 3.0 (blue) - 5.0 (red)
Cresolphthalein (ortho) 8.2 (colorless) - 9.8 (violet/red)
Cresolphthalein (meta) 1.2 (red) - 2.8 (yellow) and 7.4 (yellow) - 9.0 (purple)
Cresol Red 0.2 (red) - 1.8 (yellow) and 72 (yellow) - 8.8 (red)
Cresol Purple 1.2 (red) - 2.8 (yellow) and 7.4 (yellow) - 9.0 (purple)
Dichlorofluorescein 4.0 (colorless) - 6.6 (green)
Indigo Carmine 11.4 (blue) - 13.0 (yellow)
Methyl Orange 3.0 (red) - 6.3 (yellow)
Methyl Orange - Xylene Cyanol 2.9 (purple) - 4.6 (green)
Methyl Red 4.2 (pink) - 6.2 (yellow)
Naphtholphthalein (alpha) 7.3 (colorless/reddish) - 8.7 (blue/green)
Phenol Red 6.8 (yellow) - 8.2 (red)
Phenolphthalein 8.0 (colorless) - 10 (pink)
Thymol Blue 1.2 (red) - 2.8 (yellow)
Thymolthalein 8.8 (colorless) - 10.5 (blue)
Universal 1.0 - cherry/red
  2.0 - rose
  3.0 - reddish/orange
  4.0 - orange/red
  5.0 - orange
  6.0 - yellow
  7.0 - yellowish/green
  8.0 - green
  9.0 - bluish/green
  10.0 - blue