carboxymethyl cellulose
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Definition
- Noun:
- A chemically modified form of cellulose: Carboxymethyl cellulose is a water-soluble polymer derived from cellulose, where carboxymethyl groups (-CH₂-COOH) are introduced. It is widely used as a thickener, stabilizer, and binder in food, pharmaceuticals, and industrial products.
- An acid derivative of cellulose: This term specifically refers to the compound resulting from the reaction of cellulose with chloroacetic acid, giving it acidic properties and high viscosity in solution.
Usage Examples
- Noun:
- Carboxymethyl cellulose is a common food additive, often listed as E466 on ingredient labels.
- The scientist used carboxymethyl cellulose to increase the viscosity of the solution in the experiment.
- This pharmaceutical tablet uses carboxymethyl cellulose as a binder to hold the ingredients together.
Advanced Usage
- Technical/Industrial Context: In technical writing, "carboxymethyl cellulose" is often abbreviated as CMC. It is specified for its functional properties, such as water retention or rheological modification.
- The drilling fluid formulation required a specific grade of CMC for optimal performance.
Variants and Related Words
- Cellulose Gum: A common alternative name for carboxymethyl cellulose, especially in the food industry.
- Cellulose gum serves the same thickening function as carboxymethyl cellulose.
- Sodium Carboxymethyl Cellulose (NaCMC): The sodium salt form, which is the most commercially prevalent and water-soluble variant.
- Sodium carboxymethyl cellulose is more readily dissolved in cold water than the acid form.
Synonyms
- CMC: The standard acronym.
- Cellulose Gum: A synonym used primarily in food and cosmetic applications.
Related Phrases/Compounds
- Carboxymethyl cellulose sodium: The full name for the common sodium salt form.
- Cross-linked carboxymethyl cellulose: A modified version with different solubility and swelling properties.
Noun
- an acid derivative of cellulose