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Enter the Restek catalog number and/or lot number of the standards mix for which you need documentation.
* lot number required for custom mixes
The catalog number for a Restek analytical reference material is five or six digits, typically beginning with a "3" or a "5." The lot number consists of an "A" followed by six digits. They are found in the indicated locations on the label, and on the certificate of analysis that shipped with the product.