Chlorobutanol hemihydrate (Standard) is the standard substance of Chlorobutanol hemihydrate, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. Chlorobutanol hemihydrate (Chlorbutol hemihydrate) is an orally toxic preservative with antimicrobial activity that inhibits Gram-positive and Gram-negative bacteria and fungi, inhibits the aggregation and release of human platelets in vitro, and is commonly used in cosmetics.