China (Mainland)
HEDP CAS NO.2809-21-4
- Min.Order: 0 Metric Ton
- Payment Terms:
- Product Details
Keywords
- 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid
- CAS 2809-21-4
- ETIDRONIC ACID
Quick Details
- ProName: HEDP
- CasNo: 2809-21-4
- Molecular Formula: C2H8O7P2
- Appearance: Colorless to pale yellow aqueous solut...
- Application: HEDP is used as scale and corrosion in...
- ProductionCapacity: Metric Ton/Day
- Purity: 99%
- Storage: Storage for ten months in room shady a...
- LimitNum: 0 Metric Ton
- Impurities: 0
- Active content (HEDP)%: 58-62
- Phosphorous acid (as PO33-)%: 1.0max
- Phosphoric acid (asPO43-)%: 0.6max
- Chloride (as Cl-) ppm: 100max
- pH (1% solution): 2.0max
- Density (20℃)g/cm3: 1.43-1.47
Superiority
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.
Details
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)
Molecular Formula: C2H8O7P2
Molecular weight: 206.02
Structural Formula:
Properties:
HEDP is anganophosphoric acid corrosion inhibitor. It can chelate with Fe, Cu, Zn ions to form stable chelating compounds.It can dissolve the oxidized materials on these metals’ surfaces. HEDP shows excellent scale corrosion inhibition effects under temperature 250℃. HEDP has good chemical stability under high pH value, hard to be hydrolyzed, hard to be decomposed underdinary light heat conditions. Its acid/alkali chlorine oxidation tolerance are better than that of otherganophosphoric 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 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 fusage in winter freezing districts. Because of its high purity, it can be used as cleaning agent in electronic fields as additives in daily chemicals.
Specification:
| items | index | |
| Appearance | Clear, Colorless to pale yellow aqueous solution | White crystal powder |
| Active content (HEDP)% | 58.0-62.0 | 90.0min |
| Phosphorous acid (as PO33-)% | 1.0 max | 0.8 max |
| Phosphoric acid (asPO43-)% | 0.6 max | 0.5 max |
| Chloride (as Cl-) ppm | 100.0 max | 100.0max |
| pH (1% solution) | 2.0 max | 2.0 max |
| Density (20℃)g/cm3 | 1.43-1.47 | - |
| Fe, mg/L | 10.0 max | 5.0 max |
| Colour APHA (Hazen) | 30.0 max | - |
| Acetic acid % | 0.5 max | |
| Ca sequestration (mg CaCO3/g) | 500.0 min | |
Usage:
HEDP is used as scale corrosion inhibition in circulating cool water system, oil field low-pressure boilers in fields such as electric power, chemical industry, metallurgy, fertilizer, etc.. In light woven industry, HEDP is used as detergent fmetal nonmetal. In dyeing industry, HEDP is used as peroxide stabilizer 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, 1000-2000mg/L as detergent. Usually, HEDP is used together with polycarboxylic acid.
Package Storage:
HEDP liquid: 200L plastic drum,IBC(1000L),customers’ requirement.
HEDP solid: 25kg/bag,customers’ requirement.
Storage ften months in room shady dry place.
Safety Protection:
Acidity, Avoid contact with eye skin, once contacted, flush with water.