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Preservative Efficacy Testing

Preservative Efficacy Testing

Preservative Challenge (Preservative Effectiveness) Testing of cosmetics and personal care products is important to ensure the safety of the products prior to consumer use. According to the FDA, it is the responsibility of the finished product manufacturer to substantiate the safety of both ingredients and finished cosmetic products prior to marketing. The ability of a preservative system to protect the product from microbial growth and degradation must be established through microbial challenge testing of any formulation.

List of Commonly Used Preservatives

2-Bromo-2-Nitropropane-1,3-diol (Bronopol)
Benzalkonium Chloride
Benzyl Alcohol
Chlorhexidine digluconate
Citric Acid
Dehydroacetic Acid
Diazolidinyl Urea
DMDM Hydantoin
Essential Oils
Grapefruit Seed Extract
Imidazolidinyl Urea
Lactic Acid
Neem Oil
Polyaminopropyl biguanide
Potassium Sorbate
Salicylic Acid
Sodium Benzoate
Sodium Dehydroacetate
Sodium Metabisulfite
Sodium Sulfite
Sorbic Acid
Stearalkonium Chloride
Vitamin E (Tocopherols)
Zinc Pyrithione

Challenge testing cosmetics is possibly the single most important type of testing to protect a product. This testing allows manufacturers and formulators of cosmetics to have a clearer picture of how their products will withstand microbial attack which is inevitable during consumer use. Testing cosmetics and personal care products to ensure stability is necessary and cosmetic challenge tests are an essential part of any product’s stability testing regimen.

Qualimax LLC specializes in preservative challenge testing

We offer the following test methods:

  • USP <51> Preservative Challenge Test.
  • Customer Preservative Challenge Test and CTFA Plus Customer Validated Methods.