HEDP 60%/Scale Inhibitior/2809-21-4 Metal Sequestrant

• CAS No.: 2809-21-4
• Formula: C2h8o7p2
• EINECS: 220-552-8
• Classification: Phosphoric Acid
• Appearance: Powder
• Grade Standard: Medicine Grade
• Model NO.: HEDP
• Acid Strength: Strong Acid
• Kind: Organic Acid
• Quality: Tech Grade
• Packaging: IBC Tank
• Element: Monobasic Acid
• Oxidation: Oxidizing Acid
• Volatility: Volatile Acid
• Stability: Stabilized Acid
• Name: HEDP
• Field: 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid
• Pool Use: 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid
• Feature: Metal Sequestrant
• Transport Package: Drum
• Specification: 60%
• Trademark: AQUA CHEM
• Origin: China
• HS Code: 29319000
• Production Capacity: 25000

Product Description

 

Detailed Photos

 

Product Description

 

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

CAS No. 2809-21-4                               EINECS/ELINCS 220-552-8

Molecular Formula: C2H8O7P2         Molecular weight: 206.02

Properties:
 

HEDP is an organophosphoricacid 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 250ºC. 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 chlorin oxidation tolerance are better than that of other organophosphoricacids (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.
 

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.
 

 

Product Parameters

 

Items	Index
Appearance	Clear, Colorless to pale yellow aqueous solution	White crystal powder
Active content (HEDP)%	58.0-62.0	90.0 min
Active content (HEDP·H2O)%	-	98.0 min
Phosphorousacid (as PO3^3-)%	2.0 max	0.8 max
Phosphoricacid  (as PO4^3- )%	0.8 max	0.5 max
Chloride (as Cl^-)%	0.02 max	0.01 max
pH (1% water solution)	2.0 max	2.0 max
Density  (20ºC)g/cm^3	1.40 min	-
Fe, mg/L	20.0 max	10.0 max
Ca sequestration (mg CaCO3/g)	500.0 min

 

Packaging & Shipping

HEDP liquid: 200L plastic drum,IBC(1000L),customers' requirement.
HEDP solid: 25kg/bag,customers' requirement.
Storage for twelve months in room shady and dry place.