2026-10-15 · Professional procurement

Liquid or Powder PAC: Compare the Delivered Content Basis

Compare PAC offers using declared composition, test basis, preparation and logistics costs without assuming equal treatment performance.

Liquid and powder PAC quotations are not directly comparable by price per tonne of commercial product. A buyer must identify the declared content basis and the preparation and transport work associated with each form. Even a carefully normalized price does not prove equivalent treatment performance, so the commercial calculation should follow an appropriate technical comparison.

Identify the composition basis

Ask each supplier which content value is reported, the units and method, and whether it is a contractual specification or typical information. Clarify other properties relevant to the process rather than ranking products by one percentage alone. Do not substitute a powder's gross shipment mass for net chemical mass when comparing orders.

If a quotation uses an alumina-equivalent basis, confirm that both offers mean the same thing before calculating cost per unit of declared content. This normalization is an accounting comparison, not a statement that the products will require the same field dose or produce the same residuals.

Include the work needed at the plant

Powder may require dissolution equipment, handling and preparation time. Liquid requires suitable storage, transfer and delivered-volume arrangements. Confirm actual equipment compatibility and product-specific safety instructions. Avoid assigning an automatic cost advantage to either form without checking what the receiving facility already has.

Request the available forms and technical documents from Xinqi Polymer. Where the process also uses PAM, separate that line item using the relevant polymer supplier information. A combined package price should still disclose the identity and quantity of each product so the operating comparison remains auditable.

Compare outcomes on representative water

Keep sample preparation, process conditions and acceptance methods consistent. Record commercial product consumed at the required separation outcome, including the effect on sludge and any companion reagents. Do not turn a lower normalized content price into a treatment-cost claim without those measurements.

Record the complete offer

List delivery location, packaging, net quantity, unloading requirements, storage guidance and quotation validity. For any drinking-water application, resolve product-specific eligibility and local acceptance before use; no approval is inferred here. This comparison is for professional coagulant procurement, not for choosing a household filter or purchasing powder to add to a domestic water supply. The useful decision combines verified chemistry, workable handling and clearly defined commercial quantities.

Connect the purchase to the water question

For background, read Home Water Filter Buying Checklist: Evidence Before Equipment. Professional buyers can send the application, required evidence and planned quantity through the Xinqi product enquiry; household readers should use the domestic guidance rather than request industrial chemicals.