Stability is specified, not assumed
A botanical extract powder loses potency through moisture pickup, heat, light and oxygen exposure. Shelf life is a function of the assay, packaging and storage conditions stated on the document set ā not a generic number. Buyers should ask for the stability and shelf-life terms in writing and confirm they fit the intended formulation and climate.
Read the COA for stability-relevant specs
Beyond the active marker assay, a useful COA states moisture content, loss on drying, ash, heavy metals (Pb, As, Cd, Hg), microbial limits and residual solvents. These values predict how the powder behaves in storage: high moisture shortens shelf life and invites microbial growth, while tight solvent and metal limits protect downstream quality.
Packaging and storage terms belong in the purchase order
Sealed, opaque, desiccated packaging and a stated storage temperature keep a batch consistent from sample to production. Real examples from our catalog: green-tea extract (98% EGCG) is stored sealed, cool, dry and protected from light with a 24-month shelf life because EGCG oxidizes under alkaline and high-humidity conditions; osmanthus is kept sealed, cool and dark at or below 25Ā°C for 24 months to protect its volatile aroma; natural borneol is sealed in cool, dry, dark conditions with a 36-month shelf life but must be protected from heat because it sublimes above 41Ā°C. Put the same terms in your PO.
Match the spec to the product matrix
Oxidation-sensitive actives (carotenoids such as astaxanthin and lycopene, and polyphenols such as curcumin) need nitrogen-flushed or foil packaging and low-temperature transit. Water-dispersible powders need controlled humidity. Specify the form, carrier and storage temperature so the supplier can confirm the route instead of shipping a generic bag that degrades before it reaches your line.
Confirm shelf life at release, not only at production
Ask for a COA that reports potency assay at release and a stated shelf life under the recommended storage. A document that only shows production-date assay leaves the transit and warehouse window unverified. A documentation-first export operation states these terms up front so the material arrives within spec.