publications >> ingredients imprint sitemap German
 
welcome
news
products
publications
anti-aging
base creams
skin diagnosis
skin protection
ingredients
beauty institutes
products
problem skin
special actives
patents
books
skin topics
corneotherapy
mediathek
skin testing
trade fairs & trainings
KOKO - the company
 
Suche - Search
  Free from preservatives
 

 

 

The microbiological stability of a cosmetic product is the prerequisite for its sales capacity.
By adding one or even a number of different preservatives listed in the German Cosmetic Decree (Kosmetikverordnung - KVO) the microbiological stability can be assured. There is, however, a disadvantage: there is virtually no exception to the fact that the substances listed may cause sensitizations (allergies) under certain conditions.
In terms of consumer protection, there are several important alternatives: bottling under sterile conditions, avoiding the addition of water (e.g. oleogels, oils), hypertonic water phases (high osmotic pressure due to high substance concentrations in the aqueous phase) or by adding substances containing hydroxyl groups. These alternatives are sufficiently documented in technical literature, but regarding the production costs, they are far more expensive than processes including preservatives according to the German Cosmetic Decree list. This is the reason why the above mentioned processes are rather rarely applied by the cosmetic manufacturers.
Hydroxyl group containing substances are, among others: ethanol (alcohol), propylene glycol, glycerine, pentanediol, sorbitol and the monosaccharides. With the exception of ethanol, all the substances mentioned increase the skin hydration, hence they are multifunctional substances. Consequently, the definition of preservatives according to § 3a, section (1) of the German Cosmetic Decree is not applicable and cosmetic products containing these substances can be declared "free of preservatives" apart from the fact that in contrast to the substances listed in the German Cosmetic Decree, sensitizations can virtually be excluded.

Hans Lautenschläger

 
Please note: The publication is based on the state of the art at the publishing date of the specialist journal.

Kindly inform us at koko@dermaviduals.de if you have found any misprint or any other relevant mistake on this page

© Copyright Kosmetik Konzept KOKO GmbH & Co.KG, Leichlingen, www.dermaviduals.de
Revision: 27.10.2007
 
 
Download
 

published
in Kosmetik International
2002 (9), 105

 
ingredients - further literature
Triclosan - partial ban, widely used
Aluminium - a much-discussed element1
Waxes - an indispensable family
Summary: Release and bioavailability
Piggyback - an overview on transport systems
Without carriers only modest effects - Functions and effects of carriers in cosmetic products
Silicon - the global player in cosmetics
On substances that release emotions - a tour across the world of perfumes
From soap to high-tech emulsifiers
Acids and bases from A to Z
Ubiquitous like sand on the beaches: silicon and its compounds
Fragrance sample? Aldehydes and ketones
Versatile use - alcohols in skin care products
Denatured!!? - Use pure alcohol!
Denaturants in cosmetic products - health is secondary
(Poly)Saccharides in cosmetic products - From alginate to xanthan gum
Polyethylene glycols & Co - On effects and side effects
Vegetable oils
Shelf life of cosmetics - what makes cosmetic products unstable?
Vegetable oils and extracts - essential components
Quite a lot of different applications - new oils and extracts
A closer look on natural agents: facts and future aspects
Water and water - just not the same things: water qualities
Preservatives
Lipophilic substances - oils and lipids in cosmetic products
Shelf life and preservation
Emulsifiers enable mixtures
Ingredients - objective information appreciated
Preservatives - germs et al. under control
Additives in cosmetic products
Active agents - the effective skin care: lipids, the basic elements
Active agents, the effective skin care - vitamins, oils & more
Active agents, the effective skin care - smoothing the skin and providing overall protection
INCI - Declaration
Free from preservatives
Emulsions - micro-emulsions - nano-emulsions
Emulsifiers - looking for alternatives
Ceramides - lipids with multiple assignments