What regulatory guidelines apply to 4-Phenylmorpholine (CAS: 92-53-5)?

4-Phenylmorpholine (CAS: 92-53-5) falls under several regulatory guidelines. It is classified under the Globally Harmonized System of Classification and Labeling of Chemicals (GHS) as a category 4 sensitiser. For European markets, it must comply with REACH regulations, which require registration, evaluation, and authorization for certain substances. In the US, FDA and EPA regulations apply, particularly for pharmaceutical and agricultural applications, requiring appropriate documentation and handling procedures.