argon
| purity | 99.997% |
| oxygen | less than 0.0005% |
| dew point |
liquid argon: –90ºf or lower |
helium – gaseous
| purity | 99.995% |
| oxygen | less than 0.0005% |
| dew point |
–90ºf or lower |
helium – liquid
| purity | not less than 99.999% |
| oxygen | not more than 0.0001% |
| dew point |
–105ºf or lower |
hydrogen – gaseous
| purity | 99.95% |
| oxygen | less than 0.0005% |
| dew point |
gaseous hydrogen: –90ºf or lower |
hydrogen – liquid
| purity | 99.999% |
| oxygen | less than 0.0002% |
| dew point |
liquid hydrogen: –105ºf or lower |
medical helium – gaseous – meets usp
| purity | not less than 99.0% |
| oxygen | not more than 1.0% |
| carbon monoxide |
not more than 0.001% |
| odor |
none |
medical nitrogen – meets nitrogen nf
| nitrogen and trace inerts | 99.0% |
| oxygen | not more than than 1.0% |
| carbon monoxide |
less than 0.001% |
| odor |
none |
medical oxygen – meets oxygen usp
| oxygen | 99.0% |
| odor |
none |
nitrogen
| nitrogen and trace inerts | 99.998% |
| oxygen | less than 0.001% |
| dew point |
liquid nitrogen: –90ºf or lower |
oxygen
| purity | 99.5% |
| inerts | less than 0.5% |
| dew point |
liquid oxygen: –80ºf or lower |