O2 Usp Coa
This is a Certificate of Analysis for Oxygen USP, a gas produced by Messer, which is exempted from USP Compodium. The product has gone through a quality test conducted by a paramagnetic analyzer and was proven to be acceptable as an alternative for Oxygen assay. The final results are shown in the table. The product is only approved for human drug use if it is delivered to USP customer. The retention period for the certificate is 3 years.*