USP 51 – Antimicrobial Testing

USP 51 is an Antimicrobial test method that determines the antimicrobial efficacy of a material’s antimicrobial preservatives. Similar to other preservation challenge methods, USP 51 is commonly used to evaluate the performance of preservatives used in cosmetics and personal care products.

The USP 51 antimicrobial test is from chapter 51 of the United States Pharmacopeia.

Preservatives are antimicrobial additives that are incorporated into product formulations to help maintain the quality of a product by inhibiting and reducing microbial contamination.

Preservatives can be inherently toxic; knowing the correct dose that efficiently inhibits microbial growth but does not have adverse effects on human health is key to a successful product formulation.

Standard testing is tested against 5 organisms, 3 bacteria and 2 fungi, and is a minimum of 28 days.

Customers commonly request USP 51 for personal care products, pet care products, and cosmetics.  USP 51 is also commonly used for product development testing, quality control and product performance testing.

Customers also request other preservation methods including ASTM E640 for water containing cosmetics and personal care products.

For more information on preservation testing and antimicrobial performance, contact our antimicrobial testing laboratory at 847-483-9950 or info@situtest.com.


Situ Biosciences to Present at Personal Care EXPO

Come check out our booth #332!

Situ Biosciences will be at the Teamworks Expo in April to showcase our technical expertise in the personal care and cosmetic industry. Our team will go over product performance testing and formulation development, and be able to discuss a variety of services that help our customers meet their testing needs.

When: April 11, 2018

Located at the Donald E. Stephens Convention Center:
5555 N River Rd, Rosemont, IL 60018

Come visit our booth: #332

Please let us know if you would  like to set up a meeting at the conference.

Feel free to contact our laboratory at (847) 483-9950 or info@situtest.com