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Product details

 

INCI: Phenoxyethanol (and) Methylparaben (and) Butylparaben (and) Ethylparaben (and) Propylparaben (and) Isobutylparaben

 

Appearance: clear, colourless liquid
Odour: characteristic
Flash point (DIN 51758): > 99 °C

 

Solubility: 

 

In water EK 300is only limitedly soluble. 100 g water at 20 °C dissolve 0.05 g EK 300. To dissolve EK 300 in water, an agitator with good turbulence is necessary.

The dissolution of EK 300 in finished formulated aqueous products such as shampoos proved in practice to be unproblematical.

In polar solvents such as 1,2-propylene glycol, propanol, and acetone, EK 300 is readily soluble.

 

pH stability: High (alkaline) pH values (> 8.0) should be avoided when incorporating EK 300.  Acidic pH values have no negative influence on the effectiveness.

 

Temperature stability: EK 300 is moderately stable to heat, and can be added to products at a temperature of no more than 70 °C.

 

Suggested percentage: 0.50%  to 0.1%

 

Creams, lotions 0.50–1.00 %

Shampoos, bath preparations 0.25–0.65 %

 

Usage:

 

Use concentrations of 0.4–0.7 % EK 300 are sufficient for emulsified systems of both the w/o and o/w types.

 

On account of its limited solubility in water, in purely aqueous systems EK 300 can only be dissolved in low concentrations.

 

In formulations with a low water content, heating to 60–70 °C may be sufficient for incorporation of a sufficient amount of EK 300 into the aqueous phase.

 

In formulations that contain surfactants, EK 300 can be dissolved in the surfactants before the addition of water and other components.

 

Cosmetic products of all kinds are adequately preserved with a use- concentration of 0.25–1.0 % EK 300. The higher concentrations are especially necessary for formulations that are difficult to preserve.

Foam baths and shower preparations can normally be preserved with concentrations of 0.25–0.65 % EK 300.

Products with a high protein content require rather higher use-concentrations.

 

Products based on non-ionic surfactants also require higher concentrations of EK 300, in the range from 0.5–1.0 %.

 

Chemical compatibility: In general, it is possible for interactions to occur between various active ingredients and auxiliary substances in cosmetic formulations. Thus, during the years the active substances of EK 300 have been used, certain incompatibilities with other ingredients have been established, and are listed below;

 

• EK 300 is fully effective both in anionic as well as cationic systems.

 

• High pH values (> pH 8.0) should be avoided when using EK 300. EK 300 is fully effective in acidic media.

 

• EK 300 proved to have good chemical compatibility with anionic surfactants such as sulphates, ether sulphates and sulphonates, as well as with non-ionogenic surfactants.

 

• Non-ionic surfactants and ether sulphates lead to losses of effectiveness.
  Compatibility with sulphite ions.

 

• EK 300 exhibits no interactions with sulphite ions.

 

Storage: in the original container at room temperature.