HEDP
2809-21-4
C2h8o7p2
220-552-8
WQA, REACH
Yes
White
Liquid
Sewage Treatment Chemicals
Water Treatment Chemicals
60% Min
Sinowin
Bag, Drum
25kg, 200kg
Henan
Product Description
Chemical preis etidronic acid monohydrate HEDP
CAS No.: 2809-21-4 EINECS No.: 220-552-8
Molecular Formula: C2H8O7P2 Molecular Weight: 206.02
RIDADR: UN 3265 8/PG III
Molecular Formula: C2H8O7P2 Molecular Weight: 206.02
RIDADR: UN 3265 8/PG III
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 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 (20ºC)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 | - |
Properties:
HEDP is a kind of scale and corrosion inhibitor which belongs to organic phosphonic acid. It can form stable complexes with iron, copper, zinc and other metal ions, and can also dissolve the metal surface oxide. Under 250 ºC condition, HEDP can still play a good corrosion and scale inhibition effect.
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 show better than that of other organic phosphonic acid (salt) acids (salt).
HEDP can react with metal ions in water system to form hexa-element chelating complex, especially with calcium ions. Therefore, HEDP has good anti-scale and visible threshold effects. When used in combination with other water treatment chemicals, it shows ideal synergistic effects.
HEDP solid state is a high purity product, suitable for cold winter areas; Because of its high purity, it is especially used as the cleaning agents in electronics industry, and additives in daily chemicals.
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 show better than that of other organic phosphonic acid (salt) acids (salt).
HEDP can react with metal ions in water system to form hexa-element chelating complex, especially with calcium ions. Therefore, HEDP has good anti-scale and visible threshold effects. When used in combination with other water treatment chemicals, it shows ideal synergistic effects.
HEDP solid state is a high purity product, suitable for cold winter areas; Because of its high purity, it is especially used as the cleaning agents in electronics industry, and additives in daily chemicals.
Applications:
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.
Usage:
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 & Storage
HEDP Liquid: Normally in 200L HDPE drum, 1000L IBC, or customers' requirement.
HEDP Solid: 25kg inner liner PE bag, 1000kg woven bag, or customers' requirement.
Storage for ten months in room shady and dry place.
HEDP Solid: 25kg inner liner PE bag, 1000kg woven bag, or customers' requirement.
Storage for ten months in room shady and dry place.
