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USP 51 Antimicrobial Effectiveness Test

"USP <51>" refers to General Chapter 51 of the United States Pharmacopeia (USP). Chapter 51 describes in detail the USP method for preservative efficacy testing, sometimes called "preservative challenge testing."

If you would like to learn more about the USP <51> preservative challenge test, you are in the right place! Below, you will find a summary of the USP <51> method, along with some of its strengths and weaknesses. Be sure to also read the page called "Getting the Most from Preservative Efficacy Testing."

If you are a product formulator and would like Antimicrobial Test Laboratories to set up a preservative challenge test for you or your company, simply call the lab or click here to get a same day price quote.


Summary of the USP <51> Antimicrobial Effectiveness Test:


Strengths of the USP <51> Preservative Challenge Method:


Weaknesses of the USP <51> Preservative Challenge Method:

Antimicrobial Test Laboratories has a great deal of expertise in preservative efficacy testing, and in particular the USP <51> challenge test. Preservative tests run by the lab's microbiologists are performed consistently to produce reliable results.

For more information about the <USP 51> Preservative Challenge Method, Contact the Lab Today!