Amido naphthol red is a chemical compound that is widely used as a pH indicator. It is a red dye that changes color from red to yellow as the pH of the solution changes from acidic to basic. Amido naphthol red is commonly used in analytical chemistry, biochemistry, and microbiology.
Definitions
Amido naphthol red is a synthetic organic compound that belongs to the family of azo dyes. It has the chemical formula C17H14N4O3 and the molecular weight of 322.32 g/mol. The compound is also known as Sudan III, Oil Red O, and Solvent Red 26.
Origin
Amido naphthol red was first synthesized by German chemist Johann Peter Griess in 1874. Griess discovered that the compound could be used as a pH indicator, and it quickly became a popular tool in analytical chemistry.
Meaning in different dictionaries
According to the Merriam-Webster dictionary, amido naphthol red is “a red crystalline compound C17H14N4O3 used as an indicator in acid-base titrations.”
The Oxford English Dictionary defines amido naphthol red as “a red dye that changes color from red to yellow as the pH of the solution changes from acidic to basic.”
Associations
Amido naphthol red is commonly used in microbiology to differentiate between Gram-positive and Gram-negative bacteria. It is also used in biochemistry to measure the pH of solutions and in analytical chemistry to determine the acidity or alkalinity of a substance.
Synonyms
Some synonyms for amido naphthol red include Sudan III, Oil Red O, and Solvent Red 26.
Antonyms
There are no direct antonyms for amido naphthol red, as it is a specific chemical compound with a unique set of properties.
The same root words
Amido naphthol red contains the root words “amido” and “naphthol.” “Amido” refers to a functional group containing a carbonyl group and an amino group, while “naphthol” refers to a group of organic compounds that contain a naphthalene ring and a hydroxyl group.
Example Sentences
- The microbiologist used amido naphthol red to differentiate between Gram-positive and Gram-negative bacteria.
- The analytical chemist used amido naphthol red to determine the acidity of the sample.
- The biochemist used amido naphthol red to measure the pH of the solution.