Environmental factors are responsible for the deterioration of the raw materials used to manufacture allergenic extracts. Among these factors, moisture content and storage temperature of the materials play a combined role, responsible for the allergenic stability of raw materials. The proper storage of allergenic raw materials is critical to guarantee a particular shelf-life.
We performed a study to examine the stability of several allergenic raw materials over several years. The materials, stored under various moisture and temperature conditions, were tested at different time-intervals. The results of this study indicate that for maximum shelf-life, raw materials should be stored under conditions of low moisture (<8%) and temperature (<0oC).