Disodium of 1-Hydroxy Ethylidene-l,1-Diphosphonic Acid (for water treatment)

Technical Data Sheet

HEDP·Na2 is an organic phosphonic acid scale and corrosion inhibitor that can form stable complexes with various metal ions such as iron, copper, and zinc, and can dissolve oxides on the metal surface. HEDP·Na2 can still play a good role in corrosion and scale inhibition at 250°C, is still very stable at high pH, ​​is not easy to hydrolyze, and is not easy to decompose under general light and heat conditions. It has better acid and alkali resistance and chlorine oxidation resistance than other organic phosphonic acids (salts). It can form a six-ring chelate with metal ions in water, especially calcium ions, so it has a good scale inhibition effect and a significant solubility limit effect. When used in combination with other water treatment agents, it shows an ideal synergistic effect.

HEDP·Na2 is widely used in industrial circulating cooling water systems such as power, chemical, metallurgy, and fertilizer, as well as scale and corrosion inhibition of medium and low pressure boilers, oil field water injection, and oil pipelines; HEDP·Na2 can be used as a cleaning agent for metals and non-metals in the textile industry, a peroxide stabilizer and color fixer in the bleaching and dyeing industry, and a complexing agent in the cyanide-free electroplating industry.

Usage
As a scale inhibitor, the concentration is generally 2-20 mg/L, as a corrosion inhibitor, the concentration is generally 20-100 mg/L, and as a cleaning agent, the concentration is generally 1000-2000 mg/L. It is usually used in combination with polycarboxylic acid scale inhibitor dispersants.

Packaging and storage
HEDP·Na2 liquid is packaged in plastic barrels, 30kg or 250kg per barrel, and HEDP·Na2 solid is packaged in plastic woven bags lined with polyethylene bags, with a net weight of 25kg per bag, which can also be determined according to user needs. Store in a cool place indoors, the solid storage period is twelve months, and the liquid storage period is ten months.

Safety protection
HEDP·Na2 is weakly acidic. Pay attention to labor protection during operation. Avoid contact with skin, eyes, etc. Rinse with plenty of water after contact.