|
|
Acid-Base Indicators- Under Construction
| Indicators | Acid Color | Range | Color |
| Methyl Violet | yellow | 0.0 - 1.6 | blue |
| Malachite Green | yellow | 0.2 - 1.8 | blue-green |
| Cresol red | red | 1.0 - 2.0 | yellow |
| Thymol blue | red | 1.2 - 2.8 | yellow |
| Benzopurpurin 4B | violet | 1.2 - 3.8 | red |
| Phloxine B | colorless | 2.1 - 4.1 | pink |
| 2,4-Dinitrophenol | colorless | 2.8 - 4.0 | yellow |
| Methyl yellow (in ethanol) | |||
| Bromophenol blue yellow | |||
| Congo red blue | |||
Methyl yellow (in ethanol) red 2.9 - 4.0 yellow
Bromophenol blue yellow 3.0 - 4.6 blue-violet
Congo red blue 3.1 - 4.9 red
Methyl orange red 3.2 - 4.4 yellow
Bromocresol green yellow 4.0 - 5.6 blue
alpha-Naphthyl red red 4.0 - 5.7 yellow
Methyl red red 4.8 - 6.0 yellow
Litmus (azolitmin) red 5.0 - 7.0 blue
Bromocresol purple yellow 5.2 - 6.8 violet
4-Nitrophenol colourless 5.4 - 6.6 yellow
Bromothymol blue yellow 6.0 - 7.6 blue
Phenol red yellow 6.4 - 8.0 red
Brilliant yellow yellow 6.6 - 7.9 orange
Cresol red yellow 7.0 - 8.0 red
Metacresol purple yellow 7.4 - 9.0 violet
2,6-Divanillyldenecyclohexanone yellow 7.8 - 9.4 red
Thymol blue yellow 8.0 - 9.6 blue
Phenolphthalein colourless 8.3 - 10.0 dark pink
Ethyl bis (2,4-dinitrophenyl acetate) colourless 8.4 - 9.6 blue
Thymolphthalein colourless 9.4 - 10.6 blue
Alizarin yellow R yellow 10.0 - 12.0 red
Malachite green hydrochloride green-blue 10.2 - 12.5 colourless
Methyl blue blue 10.6 - 13.4 pale violet
Sodium indigosulphonate blue 11.4 - 13.0 yellow
Orange G yellow 11.5 - 14.0 pink
2,4,6-Trinitrotoluene colourless 11.7 - 12.8 orange
1,3,5-Trinitrobenzene colourless 12.0 - 14.0 orange
Water Quality and Pathogenic Disease Laboratories
The Center for Environmental Quality at Wilkes University operates and maintains a series
of state-of-the-art water quality and drinking water testing laboratories. The facility, a non-profit/ equal
opportunity employer, is operated and managed, within the Environmental Engineering and
Earth Sciences under the auspices of the Center for Environmental Quality.
Currently, the laboratory is PADEP/EPA approved for drinking water analysis for regulated
water supplies for microbiological agents, but has the capability to conduct analysis for
macronutrients, general water quality parameters, and toxic metals.
Homeowners Get Your Water Tested
For More information about the Environmental Quality Center, please contact:
Attn: Mr.
Brian Oram, Professional Geologist (PG)
Laboratory Director
Wilkes University
Environmental Engineering and
Earth Sciences
PO Box 111
84 West South Street
Wilkes-Barre, PA 18766
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