coal-tar creosote
Học thuậtThân thiện
Definition
- Noun:
- A dark, oily liquid derived from the distillation of coal tar: It is a chemical substance produced as a byproduct of the coal carbonization process.
- A wood preservative: Its primary industrial use is to protect wood from decay, insects, and fungal rot by impregnating it with this liquid.
Usage Examples
- Noun:
- Railroad ties are often treated with coal-tar creosote to extend their lifespan.
- The distinct smell near old utility poles is often from coal-tar creosote.
- Due to its toxicity, the use of coal-tar creosote is heavily regulated.
Advanced Usage
- Technical/Industrial Context: The term is used specifically in industrial chemistry, wood preservation, and environmental regulation. It is not used in everyday conversation.
- The environmental impact of coal-tar creosote leaching from treated wood is a subject of ongoing study.
Variants and Related Words
- Creosote (general term): Can refer to either coal-tar creosote or wood-tar creosote. In many contexts, "creosote" alone implies the coal-tar variant due to its commercial prevalence.
- Coal tar: The thick black liquid from which coal-tar creosote is distilled.
- Preservative: A general term for substances used to protect materials from deterioration.
Synonyms
- Wood preservative (specific functional synonym): Highlights its primary use.
- Distillate of coal tar: A descriptive synonym focusing on its origin.
Notes on Meaning
- This term has a single, highly specific meaning. It refers to a precise chemical product with a defined industrial application. It is not used figuratively.
Important Note
- Safety and Regulation: Coal-tar creosote is classified as a hazardous substance. Its handling and use are controlled due to health and environmental risks. It should not be confused with other, less toxic types of creosote (e.g., from wood).
Noun
- a dark oily liquid obtained by distillation of coal tar; used as a preservative for wood