When you receive your peptides, proper storage is important to ensure the accuracy of your results, to make them last longer, and to ensure that they maintain their stability. Most peptides will maintain their stability at room temperature for a few days, to a few weeks, but this is never the recommended way to store them. A good storage setting would be at a temperature of about 40C or colder, and inside airtight containers, away from direct bright light.
The container used for storing peptides, should be clear and resistant to any form of chemical breakdown. The size chosen should be appropriate based on the amount of peptides to be stored, and the container should be strong enough to withstand being moved around every time you need to use the peptide. In other words, it should be strong enough not to be compromised easily when the peptide is in use.
If in powder form, then the peptides should be kept dry at all times. The reason for this, is because, when the peptides are contaminated by moisture, their stability may be compromised, leading to significantly skewed results, when they are used. Every time you need to use the peptides, take out the storage container from the refrigerator and allow it to come to room temperature before opening it. Quickly weigh the amount you need, and then close the container immediately. In this manner, you will reduce the amount of moisture that comes in contact with the container upon opening.
Once you measure the amount you need, reseal the container, and take it back to a proper storage setting immediately.
Storing peptide sequences with W, M or C
Peptide sequences with W, M or C may be affected negatively by air oxidation, and as such, extra care is needed in storing them. To keep them safe and maintain their stability, once you receive them, remove all the air from the vials, and replace it with a blanket of nitrogen or argon, to increase the lifespan of the peptides, and to allow them to provide you with more accurate results for your research.