Long-Term Stability of Serum/Gel Formula with Ingredient Substitutions

Asked by: nichasrisawan On: January 08, 2019 Product Type: Cosmetics

Question

I have created a cosmetic formula with the following ingredients and percentages, using Hydrogenated Polydecene instead of SNP-Creamflow and SepGEL 305 instead of SNP-Emulbase:

  • Water (qs)
  • 1,3 Butylene Glycol 2.00%
  • Squalane 3.50%
  • Hydrogenated Polydecene 5%
  • SepGEL 305 1-2%
  • Hyaluronic Acid 1.00%
  • Vitamin B3 3.00%
  • Alpha Bisabolol 0.5%
  • Phenoxyethanol 0.80%

Will this formula be stable in the long term?

Answer

Formula Analysis and Substitution

Based on the staff's response, the substituted formula using Hydrogenated Polydecene instead of SNP-Creamflow and SepGEL 305 instead of SNP-Emulbase is unlikely to separate over the long term. The components are considered suitable.

Important Considerations:

  • If the oil ratio in the formula is significantly increased, you might need to consider increasing the amount of SepGEL 305.
  • The staff suggested replacing Phenoxyethanol with Mild Preserved Eco at 1% for a milder formula.

Proposed Formula with Substitutions and Suggested Preservative Change:

  • Water (qs)
  • 1,3 Butylene Glycol 2.00%
  • Squalane 3.50%
  • Hydrogenated Polydecene 5% (replacing SNP-Creamflow 3.00%)
  • SepGEL 305 1-2% (replacing SNP-Emulbase 2.50%)
  • Novermer EC-1 1.00%
  • Hyaluronic Acid 1.00%
  • Vitamin B3 3.00%
  • Alpha Bisabolol 0.5%
  • Mild Preserved Eco 1% (replacing Phenoxyethanol 0.80%)

The staff's analysis indicates that this formulation should be stable over time.

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