Is Apremilast Impurity 28 (CAS: 253168-94-4) safe?

Apremilast Impurity 28 is generally considered low risk when handled properly, but safety precautions should be followed as with any chemical. Limited toxicity data exists, but it is advisable to use personal protective equipment (PPE) such as gloves and goggles during handling. Regulatory guidelines recommend avoiding ingestion, inhalation, or skin contact. While not intended for human use, its safety profile is assessed in the context of pharmaceutical impurity standards to ensure it does not compromise the safety of the parent drug.