bromothymol blue indicator

Chất chỉ thị xanh bromothymol acid base hóa chất sinh học CAS 76-59-5 Thuốc nhuộm

Acid-Base Indicators Biological Chemicals Bromothymol Blue CAS 76-59-5 Dyes Introduction: Bromothymol blue is an acid-base indicator with a color change range of pH 6.0 (yellow) to 7.6 (blue). Ordinary water is neutral, with a pH of about 7, which is almost light green. Bromothymol blue is a colorless or light rose crystalline powder, which is easily soluble in alcohol, dilute alkaline solution and ammonia water, and slightly soluble in water. It turns yellow in acidic