safranine

Thân thiện

A scientist adds a drop of safranine to a slide under a microscope.

Definition

1. Noun:
   • A type of synthetic dye: Safranine refers to any of a group of synthetic chemical compounds primarily used as red or pink dyes and biological stains.
   • A cationic dye: In chemistry, it is classified as a cationic (positively charged) dye, often derived from phenazine.

Examples of Usage

• Noun:
  • The histologist used safranine to stain the tissue sample for microscopic examination.
  • Safranine is a common dye in textile industries for coloring fabrics a vivid red.

Advanced Usage

• In biological staining: Safranine is frequently used as a counterstain in microbiology and histology.

  • In the Gram stain procedure, safranine is applied last to color Gram-negative bacteria pink.

• As a redox indicator: In analytical chemistry, safranine can act as an oxidation-reduction (redox) indicator due to its color change properties.

  • The solution changed color, indicating the endpoint, as the safranine was reduced.

Variants and Related Words

• Safranin (n): An alternative spelling for the same class of dyes.
  • Safranin O is a specific, commonly used member of the safranine dye family.

Synonyms

• Basic Red 2 (n): A standard name for a specific safranine dye in color indexing.
• Phenosafranine (n): A related, more specific type of safranine dye.

Related Phrases and Compounds

• Safranine staining (n): The technique of using safranine as a dye in laboratory procedures.
  • Safranine staining revealed the detailed structure of the plant cell wall.

Học thuật

Noun

1. any of a class of chiefly red organic dyes

Từ đồng nghĩa

• safranin
• saffranine