How do we determine the expiry date of a skincare cream or any other product?

I am trying some different skincare lotions at home using preservatives like optiphen, phenonip etc. How do I determine the expiry date if I were to sell it?

Comments

  • MicroformulationMicroformulation Member, Professional Chemist
    Expiration dates are generally not used in Cosmetics. There are liability issues attached.

    To determine shelf lift, you must run stability testing. This is generally out of the scope of smaller manufacturers. Send it out!
     
    markfuller@microformulation.com Microformulation.com Microformulation Cosmetic Consulting provides Custom Formulations for both large Commercial accounts as well as smaller entrepreneurs. We can provide Naturally compliant Formulations under the NSF, NPA, Whole Foods and USDA Organic Certifications. BS.Pharm Albany College of Pharmacy, Union University.
  • Thank you, Is stability testing and challenge testing the same?
  • MicroformulationMicroformulation Member, Professional Chemist
    No stability testing challenges the formula to see if it is stable for the emulsion, changes in odor, color and any number of factors under a certain protocol. There is no mandated protocol but most follow the guidance of the PCPC.

    Challenge testing only assesses the preservative, not the physical factors.

    Go to the site for Microchem, a testing Lab in Texas. They answer some of these questions.

    You can NOT do these tests yourself unless you have expensive equipment and the knowledge. Send it out to someone like Microchem.


    markfuller@microformulation.com Microformulation.com Microformulation Cosmetic Consulting provides Custom Formulations for both large Commercial accounts as well as smaller entrepreneurs. We can provide Naturally compliant Formulations under the NSF, NPA, Whole Foods and USDA Organic Certifications. BS.Pharm Albany College of Pharmacy, Union University.
  • Thanks, I'll reach out to them. Appreciate your help!

  • BelassiBelassi Member, PCF student
    Make products. Leave on shelf for a year, inspect every month.
    Cosmetic Brand Creation. Concept to name to IMPI search to logo and brand registration. In-house graphic design inc. Pantone specs. Cosmetic label and box design & graphics.
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