Preserving Formulations Containing Alkyl Polyglucosides

Jul 1, 2008 | Contact Author | By: Bud Brewster, Cosmetics & Toiletries magazine
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Title: Preserving Formulations Containing Alkyl Polyglucosides
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The June 2008 issue of Cosmetics & Toiletries magazine featured an article from Cognis on the mildness of alkyl polyglucoside (APG) surfactants. The article stimulated the following comment from a reader: “Sugar-based ingredients are better sources of nutrients than fatty-based ingredients. Doesn’t a surfactant made of water and sugar present an especially attractive growth medium for microorganisms? Does that mean APGs require special preservation measures in formulations, and if so how would that challenge be met in an Ecocert setting?”

Formulations in which APGs are incorporated do not require special preservatives beyond what already are required by the rest of the ingredients, according to Barry Salka, who served as technical manager at Cognis for 23 years and currently is performing similar duties at Surfactants Inc.

“A shampoo without APGs and a shampoo with APGs would need the same kind of preservation,” Salka told C&T magazine.

Ken Klein, president of Cosmetech, agrees. “Glucosides are no more difficult to preserve than other surfactants that are basically 30% solutions in water,” Klein said. How are APGs preserved? Some answers to this question are surveyed here.

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Table 1. Selected properties of Ecocert-approved cosmetic preservatives

 Table 1. Selected properties of Ecocert-approved cosmetic preservatives

Figure 1. Alkyl polyglycoside chemistry

 Figure 1. Alkyl polyglycoside chemistry

Figure 2. Typical alkyl polyglycoside surfactant

 Figure 2. Typical alkyl polyglycoside surfactant

Figure 3. Structure of decyl glucoside

 Figure 3. Structure of decyl glucoside

BrewsterFootnotes

 a APG surfactants for personal care from Cognis include Plantacare and Plantaren. APG, when used in reference to these products, is a registered trademark of Cognis, as are Plantacare and Plantaren.

b Germaben II (INCI: Diazolidinyl urea (and) methylparaben (and) propylene glycol (and) propylparaben) is a product of ISP. 

c Kathon CG (INCI: Methylchloroisothiazolinone (and) methylisothiazolinone) is a product of Rohm and Haas.

d Plantaren 1200 (INCI: Lauryl polyglucose) is a product of Cognis. 

e Oramix NS10 (INCI: Decyl glucoside) is a product of Seppic. 

f Montanov is a trademark of Seppic.

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