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Can I legally use HC-12a / OZ-12 for use in R134a cars, or in industrial refrigeration applications?
Last Updated: 09/28/2007
The EPA, while not having jurisdiction over the use of replacement refrigerant for R134a, does not allow the use of these refrigerants as replacement refrigerants for R134a.  However, HC-12a and OZ-12 are considered safe and acceptable alternative refrigerants for industrial refrigeration applications.

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