Optiphen ND is the only one of the family that best inhibits yeast, bacteria, and mold.
Refer to Irena's preservative info post:
viewtopic.php?f=5&t=5032[b]Preservative: Optiphen™[/b]
INCI: Phenoxyethanol (and) Caprylyl Glycol
Description: Alternative for personal care formulations requiring a paraben and formaldehyde-free preservative system.
Applications/Use: Wide variety of personal care products including aqueous and anhydrous systems and emulsions.
Activity: BacteriaPH Requirement:
Temperature: 140°F (60°C) or below
Preservative: Optiphen™ PlusINCI: Phenoxyethanol (and) Caprylyl Glycol (and) Sorbic Acid
Description: Alternative for personal care formulations requiring a paraben and formaldehyde-free preservative system.
Applications/Use:
Activity: Bacteria, yeastPH Requirement: Best below 6.0; also effective higher.
Temperature: 140°F (60°C) or below
Preservative: Optiphen™ NDINCI: Phenoxyethanol (and) Benzoic Acid (and) Dehydroacetic Acid
Description: Alternative for personal care formulations requiring a paraben and formaldehyde-free preservative system
Applications/Use: Can be used in shampoos, shower gels, body washes, creams, lotions, gels and wet wipes with acidic pH. May be de-activated by non-ionic surfactants and emulsifiers; as a result, these materials should be minimized or avoided.
Activity: Bacteria, yeast, moldPH Requirement: 6.0 or below
Temperature: 176°F (80°C) or below