Is colder always better?

Not automatically. Deeper cold slows chemistry but adds handling burden, since every retrieval creates a freeze-thaw cycle for material in solution and a condensation risk for dry vials.

Do dry and reconstituted vials share a storage temperature?

No. Once in solution, material follows a much shorter timeline, and how it is divided usually matters more than the setpoint itself.

Where should the correct figure for a lot come from?

The lot documentation and your own procedure, not a general rule carried over from another compound or another supplier.

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Storage

Storage Temperature

Recommended temperature range for sealed research material.

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Research use only. For in vitro research use only. Not for human or animal consumption. Not for human consumption, medical use, or personal application.

Storage temperature is the range a sealed vial is held at between receipt and use, and it works as a rate control. Hydrolysis, oxidation and the slow rearrangements behind aggregation all run faster when material is warmer, so unnecessary warmth spends shelf life that cannot be recovered. Cooling slows those reactions rather than stopping them, which is why a stated range always comes with a stated period. Dry and reconstituted material do not share one.

Why a range rather than a single setpoint

Refrigerators and freezers cycle. A range acknowledges that real equipment drifts around its setpoint during defrost and door openings, and that the material tolerates that drift. The upper bound is a limit not to be exceeded rather than a figure to sit at.

Two lots of one compound can carry different ranges where formulation or residual moisture differ, so the label and the certificate of analysis govern rather than catalogue habit. The storage guide sets out how temperature interacts with moisture and light.

Excursions, and what to record

An excursion is time outside the range, and its significance depends on how far and how long. Brief warming of a sealed dry vial is a different problem from a solution left at bench temperature overnight, because water enables the reactions dryness suppresses.

Record excursions against the lot rather than discarding on instinct or shelving on optimism. Packaging and delivery describes how shipments are prepared before they reach a receiving log.

Frequently asked questions

Is colder always better?: Not automatically. Deeper cold slows chemistry but adds handling burden, since every retrieval creates a freeze-thaw cycle for material in solution and a condensation risk for dry vials.
Do dry and reconstituted vials share a storage temperature?: No. Once in solution, material follows a much shorter timeline, and how it is divided usually matters more than the setpoint itself.
Where should the correct figure for a lot come from?: The lot documentation and your own procedure, not a general rule carried over from another compound or another supplier.

Updated 2026-06-01