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Diluents & Preservatives When making dilutions from the concentrate vial, a number of diluents can be used. Normal Saline with Phenol (NSP) NSP is the same solution that is used to extract

Aqueous

extracts. It is a buffered solution of sodium chloride (0.9%) with phenol (0.4%) as a preservative. NSP offers limited stability protection for… read more

Potency Labeling The biologic strength (potency) of an allergenic extract can be expressed in a variety of ways. In general, all allergenic extracts are divided into 2 categories: Standardized (BAU /AU) The FDA has mandated standardization testing for a limited number of extracts. The purpose of standardization is to minimize the amount of variability between… read more

Extract Formulations Allergen extracts are available in a variety of formulations. An extract’s formulation directly impacts the stability of the allergenic proteins in solution and therefore the shelf life of the product. The FDA has determined maximum expiration dates for each formulation based on the estimated loss of potency over time. All extracts can be… read more

Ordering Supplies When ordering your allergenic extracts, you will be asked to provide some basic information about your requested products. To ensure that your order is accurate and appropriate, you should take into consideration the following: Extract Name Several allergens have similar or identical sounding names (e.g., Pecan tree pollen, Pecan food). Additionally, some allergens… read more