Import 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(Hedp) — Buy in Bulk from Supplier in China

1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP), with CAS number 2809-21-4 and molecular weight 206.02, is an organophosphoric acid corrosion inhibitor supplied by Zaozhuang Dongtao Chemical Technology Co., Ltd. from Shandong Province, China. This chelating agent forms stable complexes with metal ions such as Fe, Cu, and Zn, effectively dissolving oxidised surface materials. Its chemical stability under high pH conditions, resistance to hydrolysis, and tolerance to acid, alkali, and chlorine oxidation distinguish it from other organophosphoric compounds.

The product is available in two forms from this supplier: a colourless to light yellow transparent liquid with active HEDP content of 50.0% or 60.0%, and a white crystalline powder with 89.0% active content. The solid form is noted as a high-purity option particularly suited for use in winter and freezing climates. HEDP is applied across circulating cooling water systems in power generation, chemical processing, metallurgy, and fertiliser production. It also serves as a scale and corrosion inhibitor in low-pressure boilers, oil pipelines, and waterflood operations. In textile and light industries, it functions as a metal and non-metal detergent, while in dyeing it acts as a peroxide stabiliser and dye-fixing agent. For non-cyanide electroplating, it is used as a chelating agent. Typical dosages range from 1-10 mg/L as a scale inhibitor, 10-50 mg/L as a corrosion inhibitor, and 1000-2000 mg/L as a detergent, often combined with polycarboxylic acids for synergistic effect.

Zaozhuang Dongtao Chemical Technology Co., Ltd. is a chemical supplier based in Shizhong District, Zaozhuang City, Shandong Province, China (postal code 277122). The company supplies water treatment chemicals including HEDP to industrial buyers. The supplier is listed with a 'harbor' trust tier and is categorised as an imported seller on the platform.

Buyers should note that the supplier's response rate and average response time are currently listed as zero, which may indicate a newly registered profile or limited recent platform activity. It is advisable to confirm current stock availability, minimum order quantities, packaging specifications (the listing references 30 kg and 250 kg plastic drums for liquid, and 25 kg bags for solid), and any applicable certifications directly with the supplier before placing an order.