Define specification before asking for a sample
Give the supplier the botanical source, active marker, assay method, grade and form before requesting a sample. A clear specification lets the supplier pull the correct stock SKU or prepare a matching batch, and avoids sending a sample that cannot be quoted at bulk scale.
Choose the right sample quantity
Sample sizes differ by product route. Extracts commonly start from 50-100 g for evaluation, while cosmetic peptides start from grams. For pilot work, 1-5 kg bridges sample and bulk. State your stage (sample, pilot, bulk) so the supplier confirms the feasible quantity and the matching MOQ tier.
Confirm documents and shipping before the sample ships
Ask which documents travel with the sample: batch COA, MSDS and TDS are standard, with HPLC or UV assay reports available on request. Confirm the shipping route, Incoterm and freight responsibility (sample and freight are usually at buyer cost) and any destination-market documents such as heavy-metal or microbiology scope for the EU or US.
What a supplier should confirm before sending
A professional supplier checks stock or production feasibility, assay match, lead time and document scope before dispatching a sample. If a specification needs fresh production, the sample may take longer than stock material. Confirm these points in the RFQ so the sample you receive is representative of the bulk you will order.