Oxygen-free may refer to the absence of oxygen in an environment or in a material.

Not to be confused with free oxygen, oxygen in the atmosphere of Earth that is not combined with other elements and may be breathed by living beings.

Environmental conditions

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Oxygen-free materials

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  • Oxygen-free copper, pure copper without oxygen in its crystal lattice;
  • OFHC, oxygen-free high thermal conductivity copper;
  • CuOFP, oxygen-free pure copper containing phosphorus