standard conditions for gases

https://doi.org/10.1351/goldbook.S05910
Temperature, 273.15 K (0 ⚬C) and pressure of 105 pascals. IUPAC recommends that the former use of the pressure of 1 atm as standard pressure (equivalent to 1.01325×105 Pa) should be discontinued.
See: STP
Source:
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2216 [Terms] [Paper]
Citation: 'standard conditions for gases' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.S05910 RIS BibTex EndNote
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