Storage and Stability Across the Catalogue
Start with the state of the material in front of you. An unopened dry vial, an opened container and a prepared solution can require different storage conditions. Find the instruction for the exact form and container, then check what evidence supports the period you intend to use.
What a useful stability statement identifies
| Field | Why it matters |
|---|---|
| Material and form | Distinguishes variants, salts, complexes and oxidation states |
| Presentation | Identifies container, closure, fill and dry or solution state |
| Conditions | States temperature and any relevant environmental controls |
| Time | Defines the period actually supported |
| Measurements | Identifies the attributes examined and their criteria |
| Evidence source | Separates a supplied instruction, literature result and actual product study |
ICH Q5C treats the container, storage conditions and changes measured over time as parts of the stability assessment for biological medicinal products. Its section on reconstitution calls for evidence under the proposed conditions after preparation. These principles help frame a request for evidence about a research material. [1]
Questions differ across this catalogue
| Material context | Resolve before applying a storage statement |
|---|---|
| GHK-Cu | Peptide versus copper complex identity and the stated mass basis |
| Glutathione | Reduced or oxidised form and which attributes were monitored |
| NAD+ | Exact supplied form, grade and the scope of the stability method |
| MOTS-c and other peptides | Identified sequence/form and documented solution behaviour |
| Co-formulated blends | Both component identities and evidence for the combined presentation |
| Laboratory water | Formula, container and any supported in-use period |
If a blend report covers only one constituent, ask what was measured for the other constituent in the combined vial. Use the compound index to resolve a form or variant and the product specification guide to identify the attribute the storage evidence needs to cover.
Read dates for what they mean
Read the label attached to the date. An analysis date tells you when a sample was tested. A retest date flags a future assessment under specified conditions. If a document gives an expiry date, check the material state and conditions to which it applies. Ordering or opening a vial does not restart that period.
Choose the next guide
For an unopened vial, check the dry-material guidance and packaging and closure record. If an unexpected exposure has already happened, record the observed time and conditions using the temperature excursion guide. For a working sample, record aliquots and freeze–thaw events against the parent lot.
If the label and specification disagree, retain both versions and ask support which applies to that lot. For a shipping question, use storage and delivery controls to distinguish the planned transport arrangement from evidence of conditions during the journey.
For a newly prepared solution, record the composition, container, preparation time and final volume using the preparation guide. Revisit the research guides if the issue concerns a calculation or a sample-handling step.
Other records for this assessment
| Resource | Why open it |
|---|---|
| Epithalon | Reconcile Epithalon, Epitalon and AEDG naming. |
| Storage & Stability | Find the storage, stability or excursion record you need. |
Sources and scope
- ICH (1995). Q5C: Quality of Biotechnological Products: Stability Testing of Biotechnological/Biological Products.Sections 4.3, 6.5 and 6.6 address the final container, closure and stability after reconstitution in the guideline’s medicinal-product context.