• Formulating

  Is this preservative system enough for this niacinamide serum product?

  Posted by Abdullah on July 4, 2025 at 1:30 am

  <div>Is this preservative system enough for this serum product? </div>

  Niacinamide 5%

  <div>Lactic acid 5% active</div><div>Phenoxyethanol 0.5%</div><div>Salicylic acid 0.1%</div><div>Peg12 dimethicone 0.1%</div><div>Citric acid 0.2%</div><div>Sodium hydroxide to pH 4.</div><div>Water</div><div>
  </div><div>Package 120ml flip top cap bottle.</div>

  Abdullah replied 3 weeks, 1 day ago 2 Members · 2 Replies
• 2 Replies

• 

  PhilGeis

  Member

  July 4, 2025 at 7:39 am

  Prob need something for Fungi/Gram positives and EDTA if it works.

  • 

    Abdullah

    Entrepreneur

    July 4, 2025 at 9:02 am

    Thanks

    I don’t have any problem with EDTA but is it effective at pH 4?

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