Tagged preservative

What benzoic acid actually does in a formula, its CAS number, and how the Hotlist concentration cap shapes its practical use.

June 14, 2026Read

Sodium benzoate only works below a certain pH, which is why it's almost always paired with potassium sorbate. Here is the profile.

June 10, 2026Read

How introducing water into an anhydrous formula changes preservation needs and brings challenge testing and stability work into the picture.

April 25, 2026Read

Phenoxyethanol has a permitted ceiling, and if it's arriving pre-blended with other preservatives, your real number needs a back calculation.

April 9, 2026Read

Why a waterless whipped body butter has different preservative logic than a lotion, and how to describe that accurately on a CNF.

April 6, 2026Read

Phenoxyethanol's INCI, CAS number, and how its Hotlist maximum concentration should drive your CNF range selection.

March 31, 2026Read

Sorbic acid and potassium sorbate are the same preservative in different forms, and converting between them correctly matters for your filing.

March 19, 2026Read

Why sodium benzoate's preservative ceiling and its actual effectiveness both come down to your formula's pH, not just the percentage on the label.

March 18, 2026Read

What an ISO 11930 preservative challenge test proves, and why any water-containing cosmetic destined for the EU needs one on file.

January 30, 2026Read

Potassium sorbate (CAS 24634-61-5) only works below a certain pH. Here's the chemistry, the pairing options, and where it falls short alone.

January 29, 2026Read