The chemical name of saccharin is phthalimide, and the commercially available saccharin is the soluble sodium salt of phthalimide, which is called saccharin sodium for short. Saccharin sodium is a commonly used synthetic sweetener in food industry. Saccharin sodium is 300 to 500 times sweeter than sucrose. It does not decompose in organisms and is excreted through the kidneys. Large intake will cause acute poisoning and endanger human health; Chlorosulfonic acid is easy to absorb water and decompose to produce hydrogen chloride gas, which is harmful to human body and easy to explode. This is a banned additive.