How should Apremilast Impurity 28 (CAS: 253168-94-4) be stored?

Apremilast Impurity 28 should be stored in a cool, dry place away from light to maintain stability. It is typically kept in sealed, airtight containers to prevent contamination. Storage conditions should align with those of apremilast, such as controlled temperature (usually 2-8°C) and humidity levels. Avoid exposure to moisture or heat, and ensure proper labeling to distinguish it from the active pharmaceutical ingredient (API).