Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.

Sigma Products

More important for COO: enter a "0" if only two numbers are in front of the letter e.g. 62K1064 – you will only find the COO if you enter 062K1064.

Aldrich Products

If you find a lot number such as TO09019TO - enter the lot number 09019TO without the first two letters.

If you find a lot number with a filling-code such as 05427ES–021 - enter the lot number 05427ES without the filling-code -021.

If you find a lot number with a filling-code such as STBB0728K9 - enter the lot number STBB0728 without the filling-code K9.

COA Not Found

In some cases, a COA may not be available on-line. If your search was unable to find the COA you are looking for, you will be presented with a COA Request form. In many cases a COA can be faxed to you upon submission of this form.