Import Alkalinity Ro Membrane Antiscalant Dh191 — Buy in wholesale FOB from Supplier in China

Alkalinity RO Membrane Antiscalant DH191 from Demih Weihai Water Co., Ltd is a liquid chemical formulation designed for continuous injection into reverse osmosis feedwater to inhibit mineral scale formation on membrane surfaces. The product is specifically an alkaline antiscalant, with a pH of 10-11 measured in a 5% aqueous solution, and a specific gravity of 1.30-1.35. This chemistry distinguishes it from acidic antiscalant alternatives, making it suitable for systems where feedwater pH adjustment upward is desired or where acidic dosing would compromise downstream equipment. The formulation is stated to control calcium carbonate, calcium sulfate, and barium sulfate scale, with effective calcium carbonate inhibition up to a Langelier Saturation Index (LSI) of 3.

DH191 functions through threshold inhibition and crystal distortion mechanisms, where the active polymeric or phosphonate species adsorb onto nascent scale crystal nuclei, preventing ordered crystal growth and keeping precipitates in suspension rather than allowing them to adhere to the polyamide or cellulose acetate membrane surface. The clear, colourless liquid appearance and slight ammonia odour suggest the presence of ammonium salts or amine-functionalised scale inhibitors in the blend, common in alkaline antiscalant chemistries. The product is compatible with all major reverse osmosis membrane manufacturers' products, including thin-film composite polyamide membranes from DOW/Filmtec, Hydranautics, and Toray, as well as cellulose acetate and polysulfone types. Environmental considerations are highlighted, with the formulation designed for districts with stringent wastewater discharge requirements, implying biodegradability or low-toxicity components compared with older phosphonate-heavy formulations.

Typical application sectors include municipal drinking water production, industrial process water treatment, boiler feedwater preparation, and wastewater reuse installations. Buyers are typically water treatment engineering firms, membrane system operators, and industrial facilities running multi-stage RO trains. The product is dosed continuously upstream of the final security filter, diluted through a dosing tank or pumped directly from drum stock. The exact dosing ratio depends on feedwater analysis, recovery rate, and membrane configuration; the supplier indicates that dosing software or technical consultation is available to determine this. Packaging is supplied in standard 25 kg plastic drums or intermediate bulk containers (IBC), with custom packaging negotiable.

Demih Weihai Water Co., Ltd is registered at Room 312, Erc Park, Weihai, Shandong Province, postal code 264200, on China's eastern coast. The company holds a 'harbor' trust tier. The response rate is displayed as 0.00% with zero average response hours, indicating that prospective buyers should not rely on rapid quotation turnaround and should establish direct contact through multiple channels to confirm active operations. No information on year of establishment, registered capital, export licence, or quality certification appears in the available profile data.

The product focus is narrow, concentrated on membrane antiscalant chemistry for water treatment, suggesting either specialised formulation expertise or distribution rights to a manufactured product. The mention of dosing software and technical personnel for dosage determination implies some level of application engineering support, though the depth of this service is unverified. Buyers should independently confirm whether the company operates its own blending facility in Shandong or sources under contract, and whether it holds ISO 9001 or ISO 14001 certification relevant to chemical manufacturing. The Weihai location provides port access for bulk chemical export, though inland transport of liquid chemicals requires compliant road tanker or drum logistics.