Certificate of Analysis (COA) Search
ILMO archives lot-specific Certificates of Analysis for select gas products. Begin your search by entering the lot number of your gas, found on your cylinder’s label (e.g. 13512082I1). The result of this search will be the Certificate of Analysis specific to that lot number.
Lot Numbers are 8-12 characters, and often alphanumeric. Please check your lot number carefully as searches require an exact match, and is case sensitive. In the example above, the 9th character is the letter “I” and 10th character is the number “1”. Do not add spaces.
The Certificate of Analysis document will appear below. If you continue to encounter a problem, please contact Josh Crews, Specialty Gas Coordinator, in this form or 1-855-SPEC-GAS. Hours: Monday-Friday, 7:30a.m. - 4:30p.m. CST.