Are there alternatives to Propanethioic S-acid in synthesis (CAS: 1892-31-5)?

Several alternatives to Propanethioic S-acid in synthesis include 2-Mercaptoacetic acid and 3-Aminopropanethiol. These alternatives can be considered based on the specific reaction requirements and desired properties. For instance, 2-Mercaptoacetic acid can serve as a direct precursor in many reactions requiring a similar functionality, while 3-Aminopropanethiol can be used as a functional group modifier in peptide synthesis or as a thiol donor in click chemistry.