Bromophenol blue is useful as an acid-base indicator, a color marker and a dye. As an acid-base indicator its range lies between pH 3.0 and 4.6. Suitable as a color marker in agarose gel electrophoresis and polyacrylamide gel electrophoresis and commonly used as a dye to stain proteins in slides.
Bromothymol blue is a chemical indicator for weak acids and bases, mostly used in measuring substances that would have relatively low acidic or basic levels (near a neutral pH). Suitable for use in the laboratory as a biological slide stain.
Equal to or better than ACS specifications. Silver stain techniques are widely used to detect nanogram quantities of proteins following electrophoresis. Silver nitrate is the silver source in most silver stain procedures.