To assure that you are using effective detergent, you want to know that the detergent has not expired. Alconox, Inc. detergents have a shelf life of two years from the date of manufacture. You need to know the date of manufacture to determine the expiration date.
Some liquid bottle packages of Alconox, Inc. cleaners have expiration dates ink jet printed on the bottle next to the lot number just above the label. For other packages, you can find the date of manufacture and expiration date on the certificate of analysis (COA) of the lot of detergent that you have. For help finding the lot number of the detergent you have or help finding the COA, use the applications database at the upper left hand corner of the alconox website; select "application and put in the key word "lot number" or "COA" and click the button "search." You can also estimate the expiration date using the lot number if you know it. To estimate the expiration date from the lot number, use the 3rd and 4th character of the lot number. The 3rd character is a letter that stands for the month of manufacture using A for January thru M for December skipping the letter I to avoid confusion with the number 1. The 4th character of the lot number is a number which stands for the year of manufacture currently starting from the year 2000, such that 0=2000 and 9 = 2009. Starting in the year 2010, 0 will mean 2010 and 9 will then mean 2019 and so on. Knowing the month and year of manufacture, you now add two years and get the month of expiration. This method works for all Alconox, Inc. lot numbers except Alcotabs and packets of 1/2 ounce Alconox. Different lot number systems are used for these and you must get a certificate of analysis in order to get an expiration date for these cleaners.
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