E500 - Sodium carbonates

Origin

Sodium carbonates (E500) are a group of sodium salts of carbonic acid. They include sodium carbonate (soda ash), sodium bicarbonate (baking soda), and sodium sesquicarbonate. Sodium carbonate is typically produced industrially through the Solvay process or mined from naturally occurring deposits. Sodium bicarbonate is produced by reacting sodium carbonate with carbon dioxide and water. Sodium sesquicarbonate is a double salt of sodium carbonate and sodium bicarbonate.

Usage

Sodium carbonates are widely used in the food industry for various purposes. Sodium carbonate (E500(i)) acts as an acidity regulator, raising the pH of food products. Sodium bicarbonate (E500(ii)) is used as a leavening agent in baked goods, releasing carbon dioxide to create a light and airy texture. It's also used as an ingredient in self-rising flour and in effervescent drinks. Sodium sesquicarbonate (E500(iii)) is used as an acidity regulator and a cleaning agent. In addition to food, sodium carbonates are used in detergents, glass manufacturing, and chemical processes. They are also used to control the pH of water and in swimming pools.

Side Effects

Sodium carbonates are generally considered safe for consumption at levels typically used in food. The EFSA (European Food Safety Authority) has evaluated sodium carbonates and concluded that they do not pose a significant health risk when used as food additives. However, excessive consumption of sodium carbonates, particularly sodium bicarbonate, can lead to alkalosis (elevated blood pH), which can cause symptoms such as muscle spasms, nausea, and vomiting. Individuals with sodium-restricted diets should be mindful of their intake of sodium carbonates. No ADI (Acceptable Daily Intake) has been specified for sodium carbonates as they are considered to be of low concern at normal usage levels.

Regulatory Status

Sodium carbonates (E500) are approved for use as food additives in the European Union (EU) and the United States (US). In the EU, they are regulated under Regulation (EC) No 1333/2008 on food additives. In the US, they are generally recognized as safe (GRAS) by the Food and Drug Administration (FDA) under 21 CFR Part 184. Sodium carbonates are also permitted in many other countries worldwide, subject to local regulations and limitations.