Ammonium Alum (Number 1)
Definition and Description
Ammonium alum, also known as ammonium aluminum sulfate, is a type of chemical compound that appears as a white or transparent crystalline substance. It has the chemical formula NH₄Al(SO₄)₂·12H₂O and is commonly used in various industries, especially in food processing and purification. It is also recognized by its food additive code: E523.
Symbol and E Number:
Chemical Symbol: NH₄Al(SO₄)₂·12H₂O
E Number: E523
Source and Processing
Ammonium alum is produced by combining aluminum sulfate with ammonium sulfate in water, followed by crystallization. It occurs naturally in some minerals but is mainly manufactured for commercial use. The processed alum forms clear, solid chunks, commonly referred to as "Number 1 Alum Crystal", or in Thai, สารส้มใสก้อน(เบอร์ 1).
Uses in Food Products
Ammonium alum is primarily used as a firming agent in food preparation. It helps maintain the texture and crispness of certain processed foods. It is commonly used in pickling vegetables, making jelly, and ensuring that fruits retain their firmness during preservation.
Food Products Made with Ammonium Alum
- Pickled cucumbers and other vegetables
- Jams and jellies
- Canned fruits
- Traditional sweets requiring firm texture
Benefits of Ammonium Alum (สารส้มใสก้อน(เบอร์ 1))
- Supports food preservation, reducing spoilage
- Helps maintain food texture without chemical breakdown
- Enhances the clarity and shelf-life of food items
- Can be used as part of natural purification methods
References:
[1] Sciencedirect.com [Accessed 4 June 2025]
[2] Wikipedia.org [Accessed 4 June 2025]