naphthol

Thân thiện

A chemist carefully measures naphthol powder in a laboratory.

Definition

Noun: 1. A chemical compound: Naphthol refers to either of two crystalline phenols (C₁₀H₇OH) derived from naphthalene. These isomers are used primarily as intermediates in the manufacture of dyes, pigments, and other chemicals.

Usage

• Naphthol is a specific industrial chemical term.
• It is typically used in scientific, industrial, and chemical manufacturing contexts.
• It is often specified as alpha-naphthol (1-naphthol) or beta-naphthol (2-naphthol) to distinguish between the two isomeric forms.

Examples

• The laboratory synthesized the azo dye using beta-naphthol as a coupling component.
• Naphthol derivatives are crucial intermediates in the production of many organic pigments.
• The test for the presence of sugars often involves a reagent containing alpha-naphthol.

Advanced Usage

• "Naphthol AS": Refers to a specific class of azoic dye components (arylides of 2-hydroxy-3-naphthoic acid) used in textile dyeing.
  • The fabric was dyed using a Naphthol AS coupling process.

Variants and Related Words

• Alpha-naphthol (1-naphthol): One isomer of naphthol.
• Beta-naphthol (2-naphthol): The other isomer of naphthol.
• Naphthalene: The hydrocarbon from which naphthol is derived.

Synonyms

• 1-Naphthol (for alpha-naphthol)
• 2-Naphthol (for beta-naphthol)
• Hydroxynaphthalene (a more systematic chemical name)

Notes

• There are no common idioms or phrasal verbs associated with this technical term.

Học thuật

Noun

1. either of two phenols derived from naphthalene