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Water activity

Always on the safe side

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Title

Measurement of water activity in oil, powders and other low water content products

Objective

Measurement of water activity to ensure the microbial activity: Microorganisms need water to grow. This test gives the availability of water, and the more aW is high, the more the microorganisms will be able to grow (1 is the maximum)

Schedule

3 weeks

Quantity

Optimal: 100 g

Minimal: 50 g

Standard

USP <1241>

Or USP <1231>

EP 2.9.39

Procedure

Water activity values are obtained using a hygrometer or membrane Filtration Method.

An environment with aW < 0.75 is in general hostile to microbiological development. Microbiological growth can occur at lower aW depending of temperature, pH and other parameters.

The measurement of the water activity value is qualitatively illustrating the degree of availability and mobility of water in a product.

Accreditation

/

Production laboratory

  • External partner of Eurofins Group FRANCE, via ATS
  • Eurofins Pharma Quality Control (ACE), Les Ulis, FRANCE
  • Eurofins EVIC Spain, Barcelona, SPAIN
  • Eurofins AMS Laboratories, Sydney, AUSTRALIA
  • Eurofins Experchem Laboratories Inc., Ontario, CANADA
Locations
Cosmetics Laboratories
Map of cosmetics testing laboratories

 

Clients