Definition

1. Noun:
   • A substance that helps to mix two liquids that normally do not blend together: An emulsifier is a chemical agent, often a type of surfactant, that stabilizes a mixture of two immiscible liquids, such as oil and water, by reducing surface tension and preventing them from separating. This process is called emulsification.

Usage

• An emulsifier is used to create and maintain stable emulsions in various products.
• It is a key ingredient in many food, cosmetic, pharmaceutical, and industrial products.

Examples

• Noun:
  • Lecithin, found in egg yolks, is a natural emulsifier used in making mayonnaise.
  • The salad dressing contains an emulsifier to keep the oil and vinegar from separating.
  • Manufacturers add emulsifiers to ice cream to ensure a smooth texture.

Advanced Usage

• "To act as an emulsifier": Describes the function of a substance.
  • The gum arabic in this recipe acts as an emulsifier, binding the oil and water phases.
• Technical Context: In chemistry and food science, emulsifiers are classified by their Hydrophilic-Lipophilic Balance (HLB) value, which indicates their suitability for different types of emulsions.

Variants and Related Words

• Emulsify (verb): To make into or form an emulsion.
  • You need to emulsify the oil and lemon juice to create a stable vinaigrette.
• Emulsion (noun): A mixture of two or more liquids that are normally immiscible.
  • Milk is a natural emulsion of fat droplets in water.
• Demulsifier (noun): A substance used to break down an emulsion.
  • A demulsifier is used in the oil industry to separate crude oil from water.

Synonyms

• Surfactant: A substance that reduces surface tension, often functioning as an emulsifier, detergent, or foaming agent.
• Stabilizer: A more general term for an additive that helps maintain the physical and chemical state of a mixture; some stabilizers function as emulsifiers.

Related Phrases

• Emulsifying agent: Another term for an emulsifier.
  • Polysorbate 80 is a common emulsifying agent in cosmetics.
• Food emulsifier: Specifies an emulsifier approved for use in food products.
  • Mono- and diglycerides are widely used food emulsifiers.

Related Idioms

(No common idioms are directly based on the word "emulsifier.")

Noun

1. a surface-active agent that promotes the formation of an emulsion