Indicator رنگ pH کوچکتر گستره pH رنگ pH بزرگتر
Gentian violet (Methyl violet) 0.0–2.0
Leucomalachite green (first transition) 0.0–2.0
Thymol blue (first transition) 1.2–2.8
Methyl yellow 2.9–4.0
Bromophenol blue 3.0–4.6
Congo red 3.0–5.0
Methyl orange 3.1–4.4
Bromocresol green 3.8–5.4
Methyl red 4.4–6.2
Azolitmin 4.5–8.3
Bromocresol purple 5.2–6.8
Bromothymol blue 6.0–7.6
Phenol red 6.8–8.4
Neutral red 6.8–8.0
Naphtholphthalein 7.3–8.7
Cresol Red 7.2–8.8
Thymol blue (second transition) 8.0–9.6
Phenolphthalein 8.2–10.0
Thymolphthalein 9.3–10.5
Alizarine Yellow R 10.2–12.0
Leucomalachite green (second transition) 11.6–14

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