diammoniumsitraatti

Diammoniumsitraatti, also known as diammonium citrate, is the diammonium salt of citric acid. Its chemical formula is (NH4)2C6H6O7, consisting of a citrate dianion paired with two ammonium cations. In pure form it appears as a white crystalline solid that is highly soluble in water and moderately hygroscopic.

Production and composition

Diammoniumsitraatti is produced by partial neutralization of citric acid with ammonia or other ammonium-containing reagents, typically by introducing two equivalents of ammonium ions to citric acid. The resulting salt supplies citrate ions together with ammonium ions, and its exact composition can vary with pH and preparation conditions.

Properties

In aqueous solution, diammoniumsitraatti acts as a source of citrate ions and ammonium ions. It is soluble in water and forms a mildly acidic to neutral solution depending on concentration and temperature. Like other citrate salts, it can function as a buffering agent due to the acid–base properties of the citrate system.

Uses

Diammoniumsitraatti is used primarily as an acidity regulator and buffering agent in certain food and beverage formulations, where citrate buffers help control pH and stability. It also serves as a source of citrate and ammonium ions in some pharmaceutical and chemical synthesis applications, and may be employed as an intermediate in organic synthesis or as a specialty reagent in laboratory settings.

Safety

Handling diammoniumsitraatti should follow standard chemical safety practices. It is generally of low acute toxicity, but may cause irritation to skin, eyes, or the respiratory tract if dust is generated or inhaled in large amounts. Store in a cool, dry place and avoid prolonged exposure to moisture.

See also

Monosodium citrate, Disodium citrate, Trisodium citrate, Ammonium citrate.