Below is a figure that shows how expiration dating varies by formulation. For
standardized products, these dates were established through FDA-approved testing methods. For
non-standardized products, these dates were established by the FDA.
For more information on extract formulation, please see the section on
Extract Formulations
| Expiration dates for bulk concentrates are assigned based on the fomulation of the product |
| Glycerinated |
Maximum of 3 years |
| Aqueous |
Maximum of 18 months. Short ragweed extracts receive a maximum of 12 months due to the measured lower stability of the ragweed proteins. |
| Alum-precipitated |
Same as Aqueous |
| Lyophilized(freeze-dried**) |
Maximum of 5 years of unreconstituted andrefrigerated. Once the product is reconstituted, the maximum shelf life becomes 12 months at the highest concentration. |
Currently only available for Hymenoptera Venom
