Carrageenan, Ammonium Salt Of

Carrageenan, ammonium salt of (CAS Number: 60063-90-3) is a chemically modified derivative of carrageenan, a naturally occurring polysaccharide found in certain species of red algae (Rhodophyceae). The ammonium salt form is created by treating native carrageenan with ammonium hydroxide or ammonium salts, which modifies its chemical structure and functional properties. This modification enhances its solubility and emulsifying capabilities compared to native carrageenan.

This additive is primarily used in the food industry as an emulsifier, stabilizer, and thickener. It is commonly found in dairy products such as ice cream, yogurt, and milk-based beverages, where it prevents fat separation and maintains smooth texture. The ammonium salt form is also utilized in meat products, seafood preparations, and plant-based milk alternatives. In these applications, it helps achieve desired viscosity, prevents ingredient settling, and improves overall product stability during storage and distribution.

The ammonium salt of carrageenan has not been formally designated as Generally Recognized As Safe (GRAS) by the U.S. Food and Drug Administration, distinguishing it from native carrageenan, which holds GRAS status. However, this classification does not necessarily indicate safety concerns; rather, it reflects regulatory categorization. The FDA has recorded zero adverse events and zero recalls associated with this specific additive, suggesting a safety profile consistent with food use.

Carrageenan in general has been extensively studied since its introduction into food supplies in the mid-20th century. The primary component, the carrageenan polymer backbone, is poorly absorbed in the human digestive system and largely passes through unabsorbed. The ammonium salt modification does not significantly alter this fundamental toxicological profile, as the ammonium component itself is a normal nutrient and electrolyte in human metabolism.

The European Food Safety Authority (EFSA) has previously reviewed carrageenan and its salts and determined acceptable daily intake levels. The ammonium salt form, being a minor variation on established carrageenan chemistry, falls within these existing safety frameworks.

In the United States, while the ammonium salt form lacks formal GRAS designation, it is permitted for use in food under FDA regulations as a stabilizer and thickener. The lack of GRAS status does not prevent its use in foods; rather, it indicates that the manufacturer relies on FDA approval through other regulatory pathways, such as Food Additive Petitions or established use in commerce prior to the Food Additives Amendment of 1958.

The additive is regulated and approved in numerous countries, including those in the European Union, where it is listed as an approved food additive with the E-number designation E407a. Canada, Australia, and Japan also permit its use under specific regulatory guidelines.

Research on carrageenan and its derivatives has focused on gastrointestinal effects, absorption rates, and toxicological endpoints. Studies indicate that carrageenan salts, including ammonium forms, are not significantly absorbed intact across the intestinal barrier. Animal and human studies have demonstrated that carrageenan does not accumulate in tissues and is largely excreted unchanged.

The modification to the ammonium salt does not introduce new toxicological concerns beyond those assessed for native carrageenan. The ammonium ion itself is processed normally through standard metabolic pathways and poses no unique safety risk at dietary exposure levels.