What is the minimum level of purity specifications for CFC-12 refrigerant to be cleaned before it can be reused as defined in SAE J1991 standard?

According to the SAE J1991 standard, the minimum purity specification for CFC-12 refrigerant before it can be reused is 99.5% by weight. This standard requires that the refrigerant be free from impurities such as oil, moisture, and other refrigerants to ensure safe and effective performance in refrigeration systems. Compliance with these purity levels is essential for maintaining system efficiency and preventing potential damage.