Ethylhexylglycerin is a globally approved, versatile and
multi-functional additive as well as a very effective deodorant active. As an
emollient and mild humectant it improves the skin feel of cosmetic
formulations. It reliably inhibits the growth and multiplication of odor-causing
bacteria, while at the same time not affecting the beneficial skin flora.
Additionally, it can boost the efficacy of traditional preservatives and acts
as an antimicrobial stabilizer in combination with other cosmetic ingredients.
Ethylhexylglycerin is a representative of the 1-alkyl glycerin ethers.
It is a high purity, colorless and
almost odorless liquid with excellent properties for use in cosmetic
- skin care additive
- booster of cosmetic alcohols and glycols
- multifunctional cosmetic ingredient
- improves skin feel of cosmetic formulations
- medium spreading emollient
- effective against odor causing Gram positive bacteria
- enhancer for traditional preservative systems
- boosting and fixating of fragrance ingredients
The selection of
emollients is critical to the character of a cosmetic product. High contents of
fast spreading emollients lead to light creams with a smooth skin feel. High
contents of slow spreading emollients are used in rich creams with refatting
properties. Medium spreading emollients close the gap between fast and slow
spreading emollients, improving the refatting properties and extending the
smooth skin feel of cosmetic formulations.
To achieve a long lasting soft and smooth skin feel, a combination of fast,
medium and slow spreading emollients is necessary. Ethylhexylglycerin is a
medium spreading emollient with a spreading coefficient of about 700 mm2/10
min. The spreading properties are similar to those of dodecyl oleate,
hexyldecanol or cetearyl isononanoate. Ethylhexylglycerin is able to reduce the
tackiness and increase the speed of absorption of glycerin-containing emulsions
significantly. In addition, Ethylhexylglycerin is shown to reduce the
greasiness and soaping and improve the overall impression.
Ethylhexylglycerin is a clear, colorless
and nearly odorless liquid. It is stable to hydrolysis, temperature and pH. As
a result of its good chemical stability,
it is highly compatible with all commonly used cosmetic ingredients.
Whereas glycerin esters are attacked by lipolytic enzymes,
this is not the case with Ethylhexylglycerin due to its glycerin ether
structure. Ethylhexylglycerin is effective in pH-ranges up to 12. Use
concentration Ethylhexylglycerin can be used as skin care additive and
deodorant active in a recommended use concentration of 0.3 – 1.0%.
Due to its molecular structure, Ethylhexylglycerin can have
an influence on stability and/or viscosity of some emulsions. It has a surfactant-like
structure which can affect the hydrophilic-lipophilic-balance (HLB) of an
emulsion. The HLB value relates to the
hydrophilic and lipophilic properties of
an emulsifier and is a first hint of the choice of an emulsifier system. Typically, water-in-oil
emulsifiers have HLB values in the range of 3 – 6 while oil-in-water emulsifier
are in the range of 8 – 18. Ethylhexylglycerin has a calculated
HLB of approximately 7.5. This is relatively
high for the use in water-in-oil emulsions and relatively low for the use in oil-in-water emulsions.
Thus it can influence a given emulsifier system in the opposite direction.
Ethylhexylglycerin has limited
solubility in water (approx. 0.1 %), but is highly soluble in organic solvents,
such as alcohols, glycols and glycol
ethers. The solubility of Ethylhexylglycerin
in selected solvents is listed below. The solubility in the single solvents depends on the
whole formulation and has to be tested in individual cases.