bromphenol blue
- noun
- /ˌbroʊmˈfiːnɒl bluː/
- Specialized
:
azul de bromofenol
- The solution turned yellow because bromphenol blue indicated an acidic pH.
Examples
-
Adding bromphenol blue to the mixture helped the scientist determine when neutralization occurred.
-
In the lab, we use bromphenol blue to test the pH levels.
-
In the laboratory, bromphenol blue was used to monitor the progress of gel electrophoresis.
-
The solution turned bright yellow with bromphenol blue.
-
In the laboratory, bromphenol blue serves as an effective acid-base indicator, changing color with varying pH levels.
-
When the pH dropped to 3.5, bromphenol blue revealed its true color, signaling the presence of acidity.
-
The technician added bromphenol blue to the solution, which clearly showed a change from blue to yellow at an acidic pH.
Synonyms
A dye that changes color to show acidity between pH 3.0 and 4.6
How Acidic
Surface Forms
Morphology
bromphenol + blue
The constituent 'blue' clearly signals the colour, so a learner who knows that word would likely infer that the item is something blue. However, 'bromphenol' is a technical chemical term (brominated phenol) that a B1 learner would not reliably analyse or connect to the specific function as an acid–base indicator; the dye/function is not predictable from the parts. Because the colour is transparent but the key functional meaning (pH indicator) is technical and not derivable, the expression is best classified as semi-transparent.
Etymology
Bromphenol blue gets its name from its parts: brom (the element bromine attached to a phenol chemical) and blue for its color. It is a blue dye that changes color when a liquid becomes 'acidic' or 'basic', so scientists use it as an 'acid-base indicator'.