bromphenol blue

Thân thiện

A scientist adds a drop of bromphenol blue to a clear liquid in a test tube.

Definition

1. Noun:
   • A dye used as an acid-base indicator: Bromphenol blue is a chemical compound that changes color depending on the acidity or alkalinity (pH) of a solution. It is commonly used in laboratories to visually determine the pH of a substance.

Usage Examples

• Noun:
  • The experiment required adding a drop of bromphenol blue to the solution.
  • Bromphenol blue turns yellow in acidic conditions and blue in basic conditions.

Advanced Usage

• In titration: Bromphenol blue is often used as an endpoint indicator in acid-base titrations, signaling when the reaction is complete.

  • The chemist used bromphenol blue to determine the equivalence point of the titration.

• In gel electrophoresis: In molecular biology, bromphenol blue is used as a tracking dye in agarose or polyacrylamide gels to monitor the progress of DNA or protein migration.

  • The loading dye for the gel contained bromphenol blue to visualize the sample's movement.

Variants and Related Words

• Bromophenol blue: An alternative spelling for the same chemical compound.
• Acid-base indicator: A general term for substances like bromphenol blue that change color with pH.
• pH indicator: Another general term for a substance that shows the pH of a solution by its color.

Synonyms

• pH dye: A dye that indicates pH levels.
• Acid-base dye: A dye used to distinguish between acidic and basic environments.

Related Phrases

• To use as an indicator: The common phrase describing the primary function of bromphenol blue.
  • This dye can be used as an indicator for a specific pH range.

Học thuật

Noun

1. a dye used as an acid-base indicator

Từ đồng nghĩa

• bromophenol blue
• tetrabromo-phenolsulfonephthalein