sodium tripolyphosphate
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Definition
Noun: A white, crystalline, water-soluble compound with the chemical formula Na₅P₃O₁₀. It is a sodium salt of triphosphoric acid, primarily used as a builder in cleaning products to enhance their effectiveness.
Usage
Sodium tripolyphosphate is used as an industrial chemical additive. Its primary function is to soften water by binding to minerals like calcium and magnesium, which allows soaps and detergents to clean more efficiently. It is a key ingredient in many powdered and automatic dishwasher detergents.
Examples
- The detergent formula includes sodium tripolyphosphate to prevent hard water from interfering with the cleaning process.
- Sodium tripolyphosphate acts as a builder, improving the surfactant's ability to remove dirt.
- Due to environmental concerns about phosphorus, the use of sodium tripolyphosphate in household detergents has been restricted or banned in many regions.
Advanced Usage
- Food Industry: In a different application, sodium tripolyphosphate is used as a food additive (E451) to retain moisture in seafood, meats, and poultry.
- Example: Processed shrimp is often treated with sodium tripolyphosphate to reduce drip loss during thawing.
Variants and Related Words
- STPP: A common abbreviation for sodium tripolyphosphate.
- Pentasodium triphosphate: An alternative systematic name.
- Builder: A general term for chemicals like sodium tripolyphosphate that enhance detergent performance.
- Polyphosphate: A broader class of phosphate compounds to which sodium tripolyphosphate belongs.
Synonyms
- Pentasodium triphosphate
- STPP
- Triphosphoric acid, pentasodium salt (technical/chemical name)
Different Meanings
The term "sodium tripolyphosphate" has a single, specific meaning as a chemical compound. Its different applications (e.g., in detergents vs. in food) are uses of the same substance, not different definitions of the word itself.
Noun
- a sodium salt of triphosphoric acid used as a builder in soaps and detergents