HEDP(1-Hydroxy Ethylidene-1,1-Diphosphonic Acid )

CAS No. 2809-21-4   Molecular Formula: C2H8O7P2    Molecular weight: 206.02

Structural Formula:

hedp

hedp

Properties:

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. HEDP shows excellent scale and corrosion inhibition effects under temperature 250℃. HEDP 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). HEDP can react with metal ions in water system to form hexa-element chelating complex, with calcium ion in particular. Therefore, HEDP has good antiscale and visible threshold effects. When built together with other water treatment chemicals, it shows good synergistic effects.

The solid state of 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.

Specification:

Items Index
Appearance Clear, Colorless to pale yellow aqueous solution White crystal powder
Active content (HEDP), % 58-62 90.0 min
Active content (HEDP·H2O), % 98.0 min
Phosphorous acid (as PO33-), % 2.0 max 0.8 max
Phosphoric acid (as PO43-), % 0.8 max 0.5 max
Chloride (as Cl), ppm 100.0 max 100.0max
pH (1% water solution) 2.0 max 2.0 max
Density (20℃), g/cm3 1.43-1.47
Fe, mg/L 20.0 max 10.0 max
Color APHA (Hazen) 40.0 max
Ca Sequestration (mg CaCO3/g) 500.0 min

 

 

Usage:

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, HEDP is used as detergent for metal and nonmetal. In dyeing industry, HEDP is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, HEDP 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, HEDP is used together with polycarboxylic acid.

Package and Storage:

HEDP liquid: 200L plastic drum,IBC(1000L),customers’ requirement.

HEDP solid: 25kg/bag,customers’ requirement.

Storage for ten months in room shady and dry place.

Safety Protection:

Acidity, Avoid contact with eye and skin, once contacted, flush with water.

Category:Phosphonates Antiscalants, Corrosion Inhibitors and Chelating Agents

For more water treatment issues, please contact us export@krchemical.com

ATMP(Amino Trimethylene Phosphonic Acid)

ATMP CAS No.  6419-19-8

Molecular Formula:   N(CH2PO3H2)3                 Molecular weight:  299.05

Structural Formula:

 

Atmp Structural Formula

Atmp Structural Formula

Properties:

ATMP has excellent chelation, low threshold inhibition and lattice distortion ability. It can prevent scale formation, calcium carbonate in particular, in water system. ATMP has good chemical stability and is hard to be hydrolyzed in water system. At high concentration, it has good corrosion inhibition.

ATMP is used in industrial circulating cool water system and oilfield water pipeline in fields of thermal power plant and oil refinery plant. ATMP can decrease scale formation and inhibit corrosion of metal equipment and pipeline. ATMP can be used as chelating agent in woven and dyeing industries and as metal surface treatment agent.

The solid state of ATMP is crystal powder, soluble in water, easily deliquescence, suitable for usage in winter and freezing districts. Because of its high purity, it can be used in woven & dyeing industries and as metal surface treatment agent.

Specification:

Items Index
Standard Solid
Appearance Clear, Colorless to pale yellow aqueous solution White crystal powder
Active content, % 50.0min 95.0min
Chloride (as Cl), % 1.0 max 1.0 max
pH (1% water solution) 2.0 max 2.0 max
Fe, mg/L 20.0max 20.0max
Density (20℃), g/cm3 1.30 min

Usage:

Amino Trimethylene Phosphonic Acid is usually used together with organophosphoric acid, polycarboxylic acid and salt to built all organic alkaline water treatment agent. Amino Trimethylene Phosphonic Acid can be used in many different circulating cool water system. The dosage of 1-20mg/L is recommended. As corrosion inhibitor, the dosage of 20-60mg/L is preferred.

Package and Storage:

Amino Trimethylene Phosphonic Acid liquid:200L plastic drum,IBC(1000L),customers’ requirement.

Amino Trimethylene Phosphonic Acid solid: 25kg/bag,customers’ requirement.

Storage for ten months in shady room and dry place.

Safety Protection:

Acidity, Avoid contact with eye and skin, once contacted, flush with water.

Category:Phosphonates Antiscalants, Corrosion Inhibitors and Chelating Agents

For more water treatment issues, please contact us export@krchemical.com