E541i - Acid sodium aluminium phosphate

Origin

Acid sodium aluminium phosphate (ASAP) is a chemical leavening agent. It is synthesized chemically from sodium phosphate, aluminium oxide, and phosphoric acid. It exists as a white, odorless powder. Different forms of ASAP exist, varying in their neutralizing value (the amount of sodium bicarbonate they will neutralize). It is not found naturally.

Usage

ASAP is used primarily in baked goods as a leavening agent. It reacts with baking soda (sodium bicarbonate) to release carbon dioxide, which causes the dough to rise. It is often used in combination with other leavening acids. ASAP provides a controlled release of gas during baking, contributing to a fine and even texture in cakes, muffins, and other baked products. It is also used in self-rising flour. It can also be found in processed cheeses.

Side Effects

The primary concern with ASAP is the potential for aluminium exposure. While aluminium is naturally present in the environment, excessive intake has been linked to potential health concerns, particularly related to neurological development and bone health. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has established a provisional tolerable weekly intake (PTWI) for aluminium from all sources, including food additives. The amount of aluminium leached from foods prepared with ASAP is variable and depends on factors such as pH and temperature. Regulatory agencies monitor the use of aluminium-containing food additives to ensure that consumer exposure remains within safe limits. The European Food Safety Authority (EFSA) has re-evaluated the safety of aluminium from dietary intake and concluded that current dietary exposure may exceed the PTWI in a significant part of the European population. The main contributors to aluminium exposure are food, in particular, naturally occurring aluminium, and food additives.

Regulatory Status

Acid sodium aluminium phosphate (ASAP) is permitted for use as a food additive in many countries, including the United States and the European Union, subject to specific regulations and limitations. In the EU, it is listed as E541. Its use is regulated to ensure that consumer exposure to aluminium remains within acceptable levels. The FDA regulates ASAP under 21 CFR 182.1073 as Generally Recognized As Safe (GRAS) when used in accordance with good manufacturing practice.