Storing and Handling Research Materials

Analytical results describe a material at the time it was tested. Heat, light, moisture and repeated temperature cycling can degrade sensitive compounds afterwards, so good storage practice is what keeps a COA relevant to the material on your shelf.

• Lyophilized (freeze-dried) solids are generally most stable when kept frozen, commonly at −20 °C, for long-term storage.
• Refrigeration at 2–8 °C is typically suitable for shorter periods; follow the supplier's stated conditions.
• Avoid repeated freeze–thaw cycles, and use monitored storage with temperature logging where possible.

• Keep containers sealed and protected from direct light; amber vials or closed storage boxes help.
• Allow a cold sealed container to reach room temperature before opening it, so moisture does not condense on the contents.
• Store desiccant-protected where humidity is high, and reseal promptly after use.

• Keep the original lot number with the material at all times and file the matching COA.
• Record date received, storage location and each time the container is accessed.
• Note any deviation, such as a freezer alarm or a shipment that arrived warm, against the lot.

Handle all research materials according to the safety data sheet (SDS) and your institution's procedures, using appropriate personal protective equipment. Dispose of unused or expired materials through your facility's approved chemical waste process, never household waste or drains.