Is 5-Fluoro-1H-indole-2,3-dione (CAS: 443-69-6) safe?

5-Fluoro-1H-indole-2,3-dione is generally considered safe when handled properly. However, it may cause irritation to the skin and eyes, and its vapors can be harmful if inhaled. Safety guidelines recommend using personal protective equipment, such as gloves and goggles, and working in a well-ventilated area. It is classified as a hazardous chemical under certain regulations and should be stored and used with caution.