indicators that change color at pH 7.4

indicators | changing color at pH 7.4

indicator | pH range bromothymol blue | 6.0 to 7.6 (yellow to blue) brilliant yellow | 6.6 to 7.8 (yellow to red) phenol red | 6.6 to 8.0 (yellow to red) neutral red | 6.8 to 8.0 (red to amber) 3-nitrophenol | 6.8 to 8.6 (colorless to yellow) o-cresol red | 0 to 1.0 (red to yellow) | 7.0 to 8.8 (yellow to red) curcumin | 7.4 to 8.6 (yellow to red)