The laboratory exemption allows the continued production and import of small amounts of Class I ozone-depleting substances (ODS) for use in essential laboratory and analytical procedures. EPA has extended the essential use exemption for production of Class I ozone-depleting substances (ODS) for laboratory and analytical uses until December 31, 2021.

Laboratory uses include:

• Equipment calibration
• Extraction solvent, diluent, or carrier for chemical analysis
• Biochemical research
• Inert solvent for chemical reactions, or as a carrier or laboratory chemical
• Other critical analytical and laboratory purposes

In order to sell ODS, laboratory supply distributors must receive an essential use exemption, and keep and submit reports according to 40 CFR 82.13. Distributors must:

• Report quarterly the quantity received of each controlled substance from each producer or importer.
• Report quarterly the quantity of each controlled substance purchased by each laboratory customer whose certification was previously provided to the distributor.
• Maintain as records copies of certifications provided by laboratory customers.

In order to purchase ODS, laboratory customers must provide the producer, importer, or distributor of the substance with a one-time-per-year certification for each controlled substance, affirming that the substance will only be used for essential laboratory applications and will not be resold or used in manufacturing.

• Importing use restrictions for virgin/used Class I and II ozone depleting substances (ODS)