Import Acid Ro Membrane Antiscalant Dh150 — Buy in wholesale FOB from Supplier in China

Demih Weihai Water Co., Ltd manufactures DH150, a liquid antiscalant formulated for acid reverse osmosis membrane systems. The product is a clear light yellow liquid with specific gravity 1.15 plus or minus 0.05, pH of 5% solution at 2.5 plus or minus 0.5, and viscosity of 1.79 cP at 25 degrees Celsius. DH150 controls inorganic scale formation including calcium carbonate, calcium sulfate and barium sulfate, and maintains calcium carbonate stability up to an Langelier Saturation Index of 3. It is compatible with all major reverse osmosis membrane chemistries including polyamide thin-film composite and cellulose acetate membranes.

The active chemistry is not disclosed in the source data, but typical acid antiscalants in this pH range operate through threshold inhibition and crystal distortion mechanisms rather than chelation. The low pH of the neat or diluted product indicates an acid-based formulation, which suits feed waters where alkaline cleaners are contraindicated or where simultaneous pH reduction and scale control are desired. The 1.79 cP viscosity is close to water, permitting easy pumping and mixing without specialised equipment. Environmental claims of suitability for strict wastewater discharge zones suggest reduced phosphorus or non-phosphorus chemistry, though buyers should request the exact active ingredients and biodegradability data to confirm compliance with local effluent regulations such as EU REACH or US EPA requirements.

DH150 is dosed continuously ahead of the RO system, typically injected into the feed line after the final security filter to protect membranes from particulate and colloidal fouling as well as scale. Dilution is achieved via a dosing tank or directly from the shipping container into a calibration vessel. The exact dosing ratio depends on feed water analysis, recovery rate, and membrane array configuration, so buyers should expect to provide complete water quality data including calcium, magnesium, sulphate, barium, silica, and pH values. Applications include municipal water reclamation, industrial process water, power plant boiler feed preparation, and semiconductor ultrapure water systems where membrane scaling would cause irreversible flux decline.

Demih Weihai Water Co., Ltd is located at Room 312, Erc Park, Weihai 264200, Shandong Province, China. The supplier holds a harbor trust tier with a response rate of 0.00% and no recorded average response hours, indicating minimal platform-mediated engagement. The address places the company in Weihai, a coastal city with established marine and environmental technology sectors, though the 'Erc Park' designation suggests a technology park or incubator rather than a heavy industrial manufacturing site. The company specialises in membrane treatment chemicals, with DH150 representing an acid antiscalant product line.

The source profile does not disclose founding year, employee count, annual turnover, factory ownership, quality certifications such as ISO 9001 or NSF/ANSI/CWFA, or client references. There is no mention of in-house R&D, analytical laboratory capability, or field technical support. Buyers requiring supplier audit, MSDS with full composition disclosure, or third-party performance verification should request these directly. Given the limited response signals, initial contact should establish whether Demih Weihai operates as a manufacturer, formulator, or distributor, and whether technical support includes dosing software and on-site commissioning assistance.