60% 90% HEDP 1-Hydroxyethylidene-1, 1-Diphosphonic Acid CAS 2809-21-4

• CAS No.: 2809-21-4
• Formula: C2h8o7p2
• EINECS: 220-552-8
• Acid-Base Property: Acidic Surface Disposal Agent
• Certification: REACH, ISO
• Environmental Protection: Yes
• Model NO.: HEDP
• Color: Colorless
• Appearance: Liquid
• Type: Industrial Circulating Water Treatment Agent
• Other Name: 1-Hydroxyethylidene-1, 1-Diphosphonic Acid
• Character: Colorless Liquid
• Stock: Yes
• HS: 2931399090
• Transport Package: Drum
• Specification: 250kg, 1000kgs
• Trademark: SAMREAL
• Origin: China
• HS Code: 2931399090
• Production Capacity: 100 Tons/Month

Product Description

1-Hydroxyethylidene-1,1-diphosphonic acid [2809-21-4]

Identification
Name		1-Hydroxyethylidene-1,1-diphosphonic acid
Synonyms		1-Hydroxyethane-1,1-diphosphonic acid; 1-Hydroxyethylidenedi(phosphonic acid); Dequest 2010; Etidronic acid; HEDP
Molecular Structure
Molecular Formula		C2H8O7P2
Molecular Weight		206.03
CAS Registry Number		2809-21-4
EINECS		220-552-8

 

Properties
Density		1.45 (60% aq.)

 

Specification:

Items	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 PO3^3-^)%	2.0 max	0.8 max
Phosphoric acid  (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

 

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 twelve months in room shady and dry place.

Safety Protection:

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