Why can sanding MDF be hazardous?

Sanding MDF (Medium Density Fiberboard) can be hazardous primarily due to the release of fine dust particles that contain formaldehyde and other harmful chemicals used in the manufacturing process. Inhalation of this dust can lead to respiratory issues and long-term health problems. Additionally, the dust can be a fire hazard if not properly managed. Therefore, it's essential to use appropriate personal protective equipment, such as masks and goggles, when sanding MDF.