What is the appropriate method for cleaning up a formaldehyde spill according to safety regulations?

The appropriate method for cleaning up a formaldehyde spill involves using a chemical that can mitigate the hazards of formaldehyde, which is a toxic and potentially carcinogenic substance. Adding ammonia is a method that can help neutralize formaldehyde, as it forms a reaction that reduces the formaldehyde's harmful effects. This aligns with safety regulations designed to minimize exposure to hazardous materials.

It's important to note that simply using water to dilute does not effectively neutralize or eliminate the risks posed by formaldehyde, as it can still vaporize and pose health risks. Neutralizing with vinegar is not recommended either, since vinegar (acetic acid) does not effectively interact with formaldehyde in a way that safely neutralizes it. Covering a spill with sand might contain the spill temporarily but does not address the toxic nature of formaldehyde, nor does it neutralize the chemical itself. Therefore, using ammonia provides a more reliable and effective method for ensuring safety during a formaldehyde spill.