What regulatory guidelines apply to [(~13~C)Methylsulfinyl](~13~C)methane (CAS: 136321-15-8)?

The regulation of [(~13~C)Methylsulfinyl](~13~C)methane (CAS: 136321-15-8) is governed by various international and regional guidelines. It is classified under the Globally Harmonized System of Classification and Labeling of Chemicals (GHS) as a flammable liquid. In the European Union, it falls under REACH regulations, which require suppliers to register the substance if the annual production or import exceeds one ton. Additionally, the FDA may regulate its use in pharmaceutical applications, and the EPA oversees its environmental impact and disposal practices.