Final answer:
Reclaimed refrigerant must meet the purity criteria outlined in the ARI-700 standard to be resold, which ensures it matches new-product specifications.
Step-by-step explanation:
Reclaimed refrigerant must meet the standard set forth in ARI-700 before it can be resold. ARI-700 is a specification developed by the Air-Conditioning, Heating, and Refrigeration Institute which outlines the purity criteria that reclaimed refrigerants must meet in order to be considered acceptable for reuse in HVAC systems. The process involves removing contaminants such as moisture, oils, and acids from used refrigerant so that it can be reprocessed back to a level that complies with the new-product specifications for that particular type of refrigerant.