Etidronic Acid(HEDP) CAS 2809-21-4
Sinochem is a major HEDP & Etidronic Acid supplier. Meanwhile, our firm staffs a group of experts devoted to your development of China HEDP & Etidronic Acid.
HEDP is formed by the reaction of phosphorus trichloride with acetic acid or by the reaction of a mixture of acetic acid / acetic anhydride with phosphoric acid.
- HEDP is an organic phosphoric acid corrosion inhibitor. It can chelate with iron, copper and zinc ions to form stable chelates and dissolve oxides on the surfaces of these metals.
- It exhibits excellent scale and corrosion inhibition effects at 250°C.
- It has good chemical stability at high pH values, is not easily hydrolyzed, and is not easily decomposed under normal temperature and light and heat conditions. Its acid, alkali and chlorine oxidation resistance are better than other organic phosphoric acids (salts).
Etidronic Acid Description
Name: HEDP & Etidronic Acid
Synonyms: Hydroxyethylidene Diphosphonic Acid / 1-Hydroxyethane-1,1-diphosphonic Acid / Oxyethylene diphosphonic acid(OEDP)
Molecular Formula: C2H8O7P2
Molecular weight: 206.02
CAS NO.: 2809-21-4
Density: 2.1±0.1 g/cm3
Boiling point: 578.8±60.0 °C at 760 mmHg
Melting point: 198~199℃
Flashing point: 303.8±32.9 °C
Appearance: Colorless to light yellow viscous liquid. The pure product is a colorless, amorphous crystal.
Solubility: Soluble in water, soluble in methanol and ethanol
Properties:
1. Etidronic Acid (HEDP) is an organophosphoric acid corrosion inhibitor. It can chelate with Fe, Cu, and Zn ions to form stable chelating compounds.It can dissolve the oxidized materials on these metals’ surfaces. Etidronic Acid shows excellent scale and corrosion inhibition effects under temperature 250℃. Etidronic Acid has good chemical stability under high pH value, hard to be hydrolyzed, and hard to be decomposed under ordinary light and heat conditions. Its acid/alkali and chlorine oxidation tolerance are better than that of other organophosphoric acids (salt). Etidronic Acid can react with metal ions in water system to form hexa-element chelating complex, with calcium ion in particular.
Therefore, Etidronic Acid has good antiscale and visible threshold effects. When built together with other water treatment chemicals, it shows good synergistic effects.
2. The solid state of Etidronic Acid (HEDP) is crystal powder, suitable for usage in winter and freezing districts. Because of its high purity, it can be used as cleaning agent in electronic fields and as additives in daily chemicals.
Usage: Etidronic Acid (HEDP) is used as scale and corrosion inhibition in circulating cool water system, oil field and low-pressure boilers in fields such as electric power, chemical industry, metallurgy, fertilizer, etc.. In light woven industry, Etidronic Acid is used as detergent for metal and nonmetal. In dyeing industry, Etidronic Acid is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, Etidronic Acid is used as chelating agent. The dosage of 1-10mg/L is preferred as scale inhibitor, 10-50mg/L as corrosion inhibitor, and 1000-2000mg/L as detergent. Usually, Etidronic Acid is used together with polycarboxylic acid.
Package :
Etidronic Acid liquid: 200L plastic drum, IBC(1000L), customers’ requirement.
Etidronic Acid solid: 25kg/bag, customers’ requirement.
Storage: Keep in a cool and dry environment
Safety Protection: Acidity, Avoid contact with eye and skin, once contacted, flush with water.
About Us: With over many years as a certified HEDP & Etidronic Acid manufacturer, we combine innovation with stringent production standards to deliver high-performance product.
Hot tags: Dequest 2010; MASQUOL P 210; Mayoquest 1500; Briquest 301-60A
HEDP Technical
| Item | Index | |
| Appearance | Clear, Colorless to pale yellow aqueous solution | White crystal powder |
| Active content (HEDP)% | 60.0 min | 90.0 min |
| Active content (HEDP·H2O)% | – | 98.0 min |
| Phosphorous acid (as PO33-)% | 1.0 max | 0.8 max |
| Phosphoric acid (as PO43-)% | 0.6 max | 0.5 max |
| Chloride (as Cl–)% | 0.01 max | 0.01 max |
| pH (1% water solution) | 2.0 max | 2.0 max |
| Density (20℃)g/cm3 | 1.40 min | – |
| Fe, mg/L | 10.0 max | 5.0 max |
| Colour APHA (Hazen) | 10.0 max | – |
| Ca sequestration (mg CaCO3/g) | 500.0 min | |
As a certified HEDP & Etidronic Acid factory, we adhere to strict quality protocols, with every batch undergoing rigorous testing to ensure consistent efficacy and safety
Hydroxyethylidene Diphosphonic Acid Applications
Etidronic Acid is used as scale and corrosion inhibition in circulating cool water system, oil field and low-pressure boilers in fields such as electric power, chemical industry, metallurgy, fertilizer, etc.. In light woven industry, the product is used as detergent for metal and nonmetal. In dyeing industry, the product is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, the product is used as chelating agent.
We offer competitive HEDP & Etidronic Acid price, and exclusive discounts for large quantities, helping you effectively reduce procurement costs.
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