# Oxygen 93

Medical oxygen produced from air by PSA, with 90.0% to 96.0% oxygen by volume (Ph. Eur. 2455; USP Oxygen 93 Percent).

## Sources

- [Ultra Controlo, Medical gas answers: glossary](https://www.ultracontrolo.com/medical-gas-answers#term-oxygen-93)
- [USP-NF, Oxygen 93 Percent](https://doi.usp.org/USPNF/USPNF_M59560_02_01.html)

Reviewed: 2026-10-22. Ultra Controlo engineering. https://library.ultracontrolo.com/glossary/oxygen-93/