What regulatory guidelines apply to 3-[(4-Amino-2-methyl-5-pyrimidinyl)methyl]-4-methyl-5-[2-(phosphonooxy)ethyl]-1,3-thiazol-3-ium chloride hydrate (CAS: 273724-21-3)?

This compound requires adherence to the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) for safety classification and labeling. Under the European Union, it is subject to the Registration, Evaluation, Authorization and Restriction of Chemicals (REACH) regulation. For products in the United States, the Food and Drug Administration (FDA) and the Environmental Protection Agency (EPA) may also have specific requirements related to its use and handling.