Tetra Sodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP•Na4)

Alias: Tetrasodium Hydroxyethylidene Diphosphonate
CAS No.: 3794-83-0
Molecular Formula: C₂H₄O₇P₂Na₄
Relative Molecular Mass: 294
Structural Formula:

Performance and Applications

HEDP·Na₄ is the sodium salt of HEDP, and is an excellent inhibitor of calcium carbonate scale. It is mainly used for low-pressure boiler water treatment, circulating water treatment, industrial and municipal cleaning water, and metal corrosion inhibition in swimming pool sterilization.

The solid form of HEDP·Na₄ is white powder, easily soluble in water, hygroscopic, convenient for transportation, and suitable for use in severe cold conditions.

HEDP·Na₄ belongs to organophosphonate scale and corrosion inhibitors. It can form stable complexes with various metal ions such as iron, copper and zinc, and can dissolve oxides on the metal surface. It still maintains good corrosion and scale inhibition performance at 250℃.

HEDP·Na₄ is widely used in scale and corrosion inhibition of industrial circulating cooling water systems in electric power, chemical, metallurgical, fertilizer and other industries, as well as medium and low pressure boilers, oilfield water injection and oil pipeline transportation.

In the light textile industry, HEDP·Na₄ can be used as a cleaning agent for metals and non-metals, a peroxide stabilizer and fixing agent in the printing and dyeing industry, a cyanide-free electroplating complexing agent, and an additive for daily chemicals.

Technical Specifications

Packaging and Storage

HEDP·Na₄ liquid is packed in plastic drums, Standard capacities: 25kg, 250kg, 1250kg (IBC tank).Note: Packaging weight can be adjusted according to customer requirements. The solid is packed in plastic woven bags lined with polyethylene bags, with a net weight of 25kg per bag, or customized according to user requirements. Store in a cool indoor place. The shelf life is twelve months.

Safety Protection

HEDP·Na₄ is alkaline. Pay attention to labor protection during operation. Avoid contact with skin, eyes, etc. In case of contact, rinse immediately with plenty of clean water.