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Preservative 1388 ECO is an antimicrobial blend from Dr. Streatmans GmbH that provides excellent protection in your cosmetic products. It is Ecocert certified, is palm-free and is applicable in "natural and organic" cosmetics. Even better, it allows you a "preservative-free" claim. It's applicable in all kinds of cosmetics from tonics and splashes to gels and emulsions. It imparts outstanding protection against bacteria (Gram positive and negative) as well as against mold.
We specially recommend this preservative as a stand-alone water soluble (no need for any solubiliser) preservative for water based products such as tonics and body splashes where you don't apply any other oil soluble ingredient and want to avoid any solubiliser. You can boost its activity by applying 0.1% of
Natural chelator PA-3 which is a natural chelating agent.
In Emulsions it has a weak activity against yeast and you may need to combine it with other preservatives with a higher anti-yeast activity such as potassium sorbate or Glyceryl caprylate GMCY (0.5%) (specially if you're applying high concentrations of natural ingredients such as honey, aloe, clays and gums in your formulation).
In addition to preserving, Preservative 1388 Eco imparts moisturizing and anti-inflammatory properties to the product.
Application dosage: 3,0-4,0% (the manufacturer has updated the dosage to 2,0-4,0% recently but according to our experience 2,0% is not enough for a full spectrum preserving)
Application pH: although the supplier recommends a pH range between 4.5-5.5, we recommend a pH range between 5.0-5.5 according to our experience and further discussion with technical experts of the manufacturer. At a pH lower than 5.0, the product becomes insoluble and might cause turbidity or emulsion separation.
Application mode: adding to the water phase. Needs no solubilizer in transparent liquids
We recommend blending preservative 1388 ECO with Glyceryl caprylate GMCY (ca. 0,5%- specially in creams and lotions to boost the yeast protection) and Natural chelator PA-3 (0,05-0,5%) as a natural chelating agent. Chelating agents bind metal ions (specially iron and copper and destabilise microorganisms, boosting the preservative efficacy).
Disclaimer: This information and the information provided by the manufacturer are no replacement for a preservative efficacy test or chalenge test.