HEDP, whose chemical name is 1-Hydroxyethylidene-1,1-diphosphonic acid, is a chemical compound that belongs to the family of phosphonates. It has wide use in various industrial applications due to its excellent scale and corrosion inhibition properties.
Overview
Product name : 1-Hydroxyethylidene-1,1-diphosphonic acid
Synonym : HEDP
CAS No. : 2809-21-4
Chemical Formula : C2H8O7P2
EINECS No. : 220-552-8
Category : water treatment
HEDP Properties
| Item | HEDP 90% powder Specification | |
| Appearance | White Crystal Powder | |
| Active Content | ≥90.00% | |
| Content (as HEDP.H2O) % | ≥98.00% | |
| Phosphorous Acid (as PO33-) | ≤1.00% | |
| Phosphorous Acid (as PO43-) | ≤0.30% | |
| Chloride ( Cl ) | ≤100.00PPM | |
| PH (1%water solution) | ≤2.00 | |
| IRON | ≤10.00PPM | |
| Item | HEDP 60% liquid Specification |
| Appearance | Clear colorless to pale tan liquid |
| Active Content | ≥60.00% |
| Phosphorous Acid (as PO33-) | ≤2.00% |
| Phosphorous Acid (as PO43-) | ≤0.80% |
| Chloride ( Cl ) | ≤100.00PPM |
| Sequestrant value (CaCO3) mg/g as product at PH 11-12 | ≥500.00 |
| PH (1% water solution) | ≤2.00 |
| IRON | ≤35.00PPM |
HEDP applications
Water Treatment
Scale Inhibition
HEDP is widely as a scale inhibitor in water treatment processes, particularly in cooling water systems. It helps prevent the formation of scale deposits, which can reduce the efficiency of heat exchange equipment.
Corrosion Inhibition
HEDP also acts as a corrosion inhibitor, protecting metal surfaces from corrosion in water systems. This is especially important in industrial settings where metal equipment is in contact with water.
Antiscalant in Reverse Osmosis (RO) Systems
HEDP is an antiscalant in RO systems to prevent the formation of scale on the membrane surfaces, which can impair the efficiency of the RO process.
Detergent and Cleaning Industry
HEDP can enhance products performance by preventing the formation of scale and improving the stability of formulations in household and industrial cleaning products, such as detergents and soaps.
Oil Field
In the oil and gas industry, HEDP is a scale and corrosion inhibitor in drilling fluids and well stimulation processes.
Textile
HEDP finds applications in the textile industry as a stabilizing agent in dye baths. It is helpful to prevent the precipitation of metal ions that can negatively impact the dyeing process.
Metal Treatment
In metal treatment processes, such as metal plating and surface treatment, HEDP can inhibit scale formation and corrosion on metal surfaces.
Pulp and Paper Industry
HEDP has wide use in the pulp and paper industry to control scale formation and deposition in pulp processing and papermaking equipment.
Agrochemicals
HEDP serve as a stabilizer and chelating agent in certain agricultural.
Packaging
HEDP liquid : Normally in 200L HDPE drum, 1000L IBC and ISO tank
Storage
Store in cool and dry air-flowing area preventing sunlight. Shelf life: two years.
