Reference library

Storing and handling lyophilised research compounds

Research use only — not for human or animal consumption

Lyophilised (freeze-dried) research compounds are most stable kept cold, dry, and dark. As a general rule, store the sealed powder cool and protected from light and moisture; once reconstituted, keep it refrigerated at 2–8°C and use it within the period noted in the storage guidance supplied with the order. Always follow the batch-specific guidance.

Why compounds are supplied lyophilised

Freeze-drying removes water, which slows the chemical and physical changes that degrade a compound in solution. A lyophilised powder is therefore more stable in transit and storage than the same compound dissolved. The trade-off is that handling — reconstitution, aliquoting, and storage afterwards — is where most avoidable degradation happens, so it is worth getting right.

Storing the sealed powder

Keep it cold and dry. Follow the storage condition stated for the specific compound. Many lyophilised research compounds are kept refrigerated or frozen; the supplied guidance takes precedence.
Protect from light and moisture. Keep vials sealed until use; condensation on a cold vial can introduce moisture, so allow a vial to reach room temperature before opening where advised.
Avoid repeated temperature swings. Stable storage is better than moving material in and out of the cold repeatedly.

Reconstitution and handling

Use an appropriate solvent and technique for the compound and your protocol; add solvent gently against the vial wall rather than directly onto the powder.
Minimise freeze–thaw cycles. Each cycle can degrade sensitive compounds. Preparing single-use aliquots after reconstitution avoids thawing the whole stock repeatedly.
Label aliquots with the compound, lot code, concentration, and date so they stay traceable to the COA.

After reconstitution

Once in solution, stability falls. As a general guide, keep the reconstituted material refrigerated at 2–8°C and use it within the window indicated in the guidance supplied with your order; for longer storage, follow the freezing and aliquoting advice for that compound. The batch-specific storage note always overrides general rules of thumb.

Cold-chain on delivery

Cold-chain items are dispatched with handling guidance. On receipt, store the item correctly straight away. If a package appears compromised in transit, document it before opening where it's safe to do so and contact us — see the Returns & Refunds policy for how transit issues are handled. Correct storage after delivery is the recipient's responsibility.

Keeping material traceable

Good storage and good record-keeping go together. Keep the lot code with the material at every step, so any aliquot can be traced back to the certificate of analysis for the batch. That traceability is what lets you tie a result back to a characterised, documented sample.