Keep sample identity through approval
Use coded samples and record product form, Al2O3 basis, basicity, lot, preparation and application conditions.
The quotation and production supply should refer to the approved identity or disclose a proposed change for revalidation.
Request current product documents
Request the applicable COA and SDS for the proposed supply identity and confirm site-specific approval needs.
Do not substitute generic claims for current documents and plant review.
Inspect product handling quality
Review appearance, packaging integrity, liquid density or powder dissolution and feeder response during receiving checks.
Damaged packing or poor preparation can affect treatment even when the PAC chemistry has not changed.
Normalize commercial comparisons
Compare delivered price on a consistent active basis and include dose, preparation, handling, sludge and clarification performance.
A stable treatment window is more valuable than a low unit price unsupported by representative tests.
Define packing and logistics
State bag, pallet, marking, document, destination and timing requirements with trial and monthly quantity.
Confirm dry storage, handling equipment and stock rotation before shipment.
Create a receiving and change-control plan
Record lot, documents and a simple reference solution or process check for incoming supply.
Revalidate after material process changes, formulation changes or performance outside the approved window.