Appearance: The product is typically colorless or white crystals, odorless with a barely sweet taste. Industrial-grade versions, due to the presence of iron and other elements, appear yellowish-green with a sour taste.

Stability: The product is stable in the air under normal conditions.

Thermal Properties: When heated to 250°C, it loses its crystal water. At temperatures above 700°C, the product starts to decompose into aluminum oxide, sulfur trioxide, and water vapor.

Decomposition Characteristics: The decomposition begins above 700°C, resulting in the formation of aluminum oxide, sulfur trioxide, and water vapor.