propanediol
Definition
Noun: 1. A chemical compound: A sweet, colorless, thick, and water-absorbing liquid. It is a type of glycol, specifically a diol with three carbon atoms. 2. An industrial and commercial substance: It is used for its physical properties in various products, including as an antifreeze agent, a component in brake fluid, and a moisturizing agent (humectant) in cosmetics and personal care items. It is noted that it can be absorbed through the skin, which may cause harmful effects.
Usage Examples
- Noun:
- The chemist synthesized propanediol in the laboratory.
- Some cosmetic brands use propanediol as a safer alternative to other glycols.
- The safety data sheet warned about the potential hazards of skin absorption of propanediol.
Advanced Usage
- In scientific nomenclature: Often referred to by its more specific IUPAC name, , or its common name, . This distinguishes it from its isomer, .
- In regulatory or safety contexts: Discussed concerning its toxicological profile, dermal absorption rates, and its status as "generally recognized as safe" (GRAS) for certain uses by agencies like the FDA.
Variants and Related Words
- Propylene Glycol (PG): The most common and widely used name for commercial 1,2-propanediol.
- 1,3-Propanediol: A different chemical isomer of propanediol, often produced by biological fermentation and used in the production of polymers.
- Diol: A general chemical term for any compound containing two hydroxyl (-OH) groups, which is the functional group class to which propanediol belongs.
Synonyms
- Propylene Glycol (the primary synonym in industrial and commercial contexts)
- 1,2-Propanediol (the precise chemical name)
- Methyl ethylene glycol
Related Phrases / Terms
- Humectant: A substance that retains moisture; this is one of the primary functions of propanediol in cosmetics.
- Antifreeze agent: A substance that lowers the freezing point of a water-based liquid; a common application of propanediol.
- Hygroscopic liquid: A liquid that readily absorbs moisture from the air; a key physical property of propanediol.
Noun
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a sweet colorless, viscous, hygroscopic liquid used as an antifreeze and in brake fluid and also as a humectant in cosmetics and personal care items although it can be absorbed through the skin with harmful effects
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