Research Grade 4.8
Minimum Purity 99.998%

Oxygen (O2) < 2 ppm
Nitrogen (N2) < 8 ppm
Moisture (H2O) < 3 ppm
Total Hydrocarbons < 1 ppm
Carbon Monoxide (CO) < 1 ppm

Instrument Grade 4.0
Minimum Purity 99.99%

Oxygen (O2) < 20 ppm
Moisture (H2O) < 10 ppm
Total Hydrocarbons < 10 ppm

Up to 50 lbs

830 PSI

SFC GRADE 4.8
Minimum Purity 99.998%
With eductor tube

Nitrogen (N2) < 10 ppm
Moisture (H2O) < 2 ppm
Hydrogen (H2) < 2 ppm
C1-C6 Hydrocarbons < 2 ppm
Carbon Monoxide (CO) < 2 ppm
Argon (Ar) + Oxygen (O2) < 2 ppm