pyrogallol

Thân thiện

A scientist carefully weighs pyrogallol crystals in a laboratory.

Definition

Noun: 1. A chemical compound: Pyrogallol is a specific, toxic, organic chemical compound. It is formally known as 1,2,3-trihydroxybenzene. It appears as white, lustrous (shiny) crystals. 2. A type of phenol: It belongs to the class of chemicals called phenols, which are aromatic organic compounds containing a hydroxyl (-OH) group bonded directly to an aromatic hydrocarbon ring. Pyrogallol has three such hydroxyl groups.

Usage

Pyrogallol is a technical term used primarily in chemistry, medicine, and photography. It is not used in everyday conversation. * In medicine/pharmacy: It has been used historically as a topical agent (applied to the skin) to treat certain skin conditions, such as psoriasis. Its use is now limited due to its toxicity. * In photography: It has been used as a developing agent for photographic film. * In chemistry/laboratories: It is used as a reagent, particularly as an absorbent for oxygen in gas analysis.

Examples

• Noun:
  • The old photographic formula called for the use of pyrogallol as the developing agent.
  • Due to its toxicity, the medical application of pyrogallol is highly controlled.
  • In the lab, pyrogallol solution is used to determine the oxygen content in a gas mixture.

Advanced Usage

• Chemical Synthesis: Pyrogallol serves as a starting material or building block in the synthesis of other, more complex organic compounds and dyes.
• Antioxidant Properties: In scientific research, its chemical structure is studied for its antioxidant behavior, as it can readily donate hydrogen atoms.

Variants and Related Words

• Pyrogallic acid: This is a synonym for pyrogallol, reflecting its acidic properties in chemical contexts.
• 1,2,3-Trihydroxybenzene: This is the systematic IUPAC name for the compound, describing its precise chemical structure.
• Developer (photographic): A general term for chemicals like pyrogallol used to develop latent images on film.

Synonyms

• Pyrogallic acid
• 1,2,3-Trihydroxybenzene (technical)
• Benzene-1,2,3-triol (technical)

Notes on Meaning

The word pyrogallol refers strictly to this single, specific chemical compound. It does not have different everyday meanings. Its definitions are all technical and relate to its identity as a substance with particular properties (toxic, crystalline, phenolic) and specific historical or specialized uses (medical, photographic, analytical).

Học thuật

Noun

1. a toxic white lustrous crystalline phenol used to treat certain skin diseases and as a photographic developer

Từ đồng nghĩa

• pyrogallic acid