Which of the following products is classified as non-hazardous waste?

Non-hazardous waste refers to materials that do not pose a significant risk to health or the environment when disposed of properly. In the context of dental waste, lead foil is a product that is classified as non-hazardous waste. While it is important to manage all types of dental waste with care, lead foil, which is often used in x-ray film packaging, does not typically carry the same toxic risk as other materials listed.

Amalgam capsules, developer solution, and expired Botox ampoules are all classified as hazardous due to their contents. Amalgam capsules contain mercury, which is toxic and requires special disposal methods. Developer solution contains chemicals that can be harmful, and therefore, it must be disposed of as hazardous waste. Expired Botox ampoules contain botulinum toxin, which is also hazardous and must be handled and disposed of according to strict regulations to prevent health risks.

Given this context, lead foil is classified differently and can be managed in a less stringent manner compared to the other more dangerous substances listed.