Final answer:
Unused chemical exfoliants should be disposed of at proper disposal facilities or by participating in take-back programs, not by flushing down the toilet or sink. Incineration at high temperatures is a common method for neutralizing chemical waste, and safety guidelines must be followed to prevent pollution.
Step-by-step explanation:
The proper way to dispose of unused chemical exfoliants, which are in the form of a commercial chemical product, is to follow guidelines that prevent environmental pollution. It is essential not to discard these substances via the toilet or sink as they may cause environmental harm. Instead, chemical waste should be taken to a proper disposal facility or participate in a take-back program. In some cases, facilities are equipped for the incineration of chemical waste at high temperatures, often above 1000 degrees Celsius, which is considered sufficient to neutralize most of its harmful effects. Always consult safety data sheets and follow your instructor's or local waste authority's guidelines on proper disposal methods. Remember that improperly discarded chemical products can contribute to air, water, and soil pollution, which poses a significant risk to both the environment and public health.