What regulatory guidelines apply to 1-(beta-D-Ribofuranosyl)-2-thioxo-2,3-dihydro-4(1H)-pyrimidinone (CAS: 20235-78-3)?

This compound is regulated under the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) as a category 1A mutagen. It is also subject to the European Union’s REACH regulations, which require registration for substances above certain tonnage thresholds. FDA and EPA may also have specific labeling and handling requirements for this compound, particularly in pharmaceutical and environmental contexts.