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Keyword "HEDP"
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP) (03/12/2009)

Alias: 1-Hydroxy Ethidene -1,1-Diphosphonic Acid   Dequest:2010

Molecular Formula:     C2H8O7P2        &nb sp;       Molecular weight: 206.02

1, Properties

 

HEDP is an organophosphoric acid corrosion inhibitor. It can chelate with Fe, Cu, and Zn etc. metal ions and form stable complex compound. It can dissolve the oxidized materials on these metals’ surfaces. Under  250℃ HEDP shows excellent scale and corrosion inhibition ability. 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 of HEDP is high purity product, suitable for using in winter and freezing districts. it is quite suitable for using as cleaning agent in electronic fields and as additives in daily chemicals. 

2, Specification:

conform to HG/T 3537-1999

 

ITEMS

Index

HG/T 3537-1999

　

Appearance

Colorless or light yellow transparent liquid

White crystal powder

Active content (as HEDP) % ≥

50.0       60.0

89.0

Phosphorous acid (as PO33-)%≤

2.0      &nb sp; 2.0

0.80

Phosphoric acid  (asPO43- )% ≤

0.8      &nb sp; 0.8

0.50

Chloride (as Cl-)% ≤

1.0      &nb sp; 1.0

0.10

pH (1％ solution) ≤

2        ;   2

2.0

Density  (20℃)g/cm3 ≥

1.34       1.40

——

Fe ion ppm   ≤

10      &nbs p;  10

5.0

Active content(as HEDP•H2O) % ≥

——

98.0

Ca sequestration mg/g  ≥

450         & nbsp;       500

--

 

三、HEDP Application range&using method

HEDP is widely used in the in circulating cool water system of electric power, chemical industry, metallurgy, fertilizer, etc. and widely used as a scale and corrosion inhibitor of low-pressure boilers, field waterflood, oil pipeline.

 In light&textile 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.
 四、HEDPPackage and Storage:

ATMP liquid: Normally In 30kg or 250kg net Plastic Drum;

ATMP solid: 25kg inner liner polyethylene (PE) bag, outer plastic woven bag, or confirmed by clients request.

Storage for ten months in room shady and dry place.

5,Safety Protection:

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

[Related Categories: Organic Acid ]
[Related Keywords: HEDP ]
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) (11/17/2008)

1-Hydroxy Ethylidene-1,1-Diphosphonic Aci d (HEDP)

CAS No. 2809-21-4               & nbsp;         &n bsp;         &nb sp;  

Molecular Formula:   C2H8O7P2&n bsp;         &nb sp;     Molecular weight:  206.02

Propertiesof HEDP:

HEDP is an organophosphoric aci d corrosion inhibitor. It can chelat e with Fe, Cu, and Zn ions  ;to form stable chelating compounds.It&nb sp;can dissolve the oxidized materials&nb sp;on these metals\' surfaces. HEDP shows excellent  scale and corrosion inhibition effe cts under temperature 250 C. HEDP has good chemical s tability under high pH value, hard&n bsp;to be hydrolyzed, and hard to&nb sp;be decomposed under ordinary light&nbs p;and heat conditions. Its acid/alkali&nb sp;and chlorine oxidation tolerance are&n bsp;better than that of other organo phosphoric acids (salt). HEDP can re act with metal ions in water sy stem to form hexa-element chelating  complex, with calcium ion in particu lar. Therefore, HEDP has good antisc ale and visible threshold effects. W hen built together with other water& nbsp;treatment chemicals, it shows good&n bsp;synergistic effects.

The solid state of HEDP is  crystal powder, suitable for usage& nbsp;in winter and freezing districts.&nb sp;Because of its high purity, it&nb sp;can be used as cleaning agent&nbs p;in electronic fields and as additi ves in daily chemicals. 

Specification of HEDP:

Appearance

Colorless or light yellow trans parent liquid

White crystal powder

Active content (HEDP)%    58.0-62.0 89.0 min

Phosphorous acid (as PO33-)%  2.0 max 0.5 max

Phosphoric acid  (asPO43- )%  0.8 max 0.5 max

Chloride (as Cl-)%         &nb sp;0.01 max 0.01 max

pH (1%  solution)         &nb sp;   2 max 2 max

Density  (20 C)g/cm3         &nb sp;1.40 -

Fe ion ppm         &nb sp;      10 max 20 max

Colour APHA (Hazen)         &nb sp;40 max -

[Related Categories: Water Treatment ]
[Related Keywords: HEDP, HEDP Na, HEDP Na2 ]
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) (11/17/2008)

1-Hydroxy Ethylidene-1,1-Diphosphonic Aci d (HEDP)

CAS No. 2809-21-4               & nbsp;         &n bsp;         &nb sp;  

Molecular Formula:   C2H8O7P2&n bsp;         &nb sp;     Molecular weight:  206.02

Propertiesof HEDP:

HEDP is an organophosphoric aci d corrosion inhibitor. It can chelat e with Fe, Cu, and Zn ions  ;to form stable chelating compounds.It&nb sp;can dissolve the oxidized materials&nb sp;on these metals\' surfaces. HEDP shows excellent  scale and corrosion inhibition effe cts under temperature 250 C. HEDP has good chemical s tability under high pH value, hard&n bsp;to be hydrolyzed, and hard to&nb sp;be decomposed under ordinary light&nbs p;and heat conditions. Its acid/alkali&nb sp;and chlorine oxidation tolerance are&n bsp;better than that of other organo phosphoric acids (salt). HEDP can re act with metal ions in water sy stem to form hexa-element chelating  complex, with calcium ion in particu lar. Therefore, HEDP has good antisc ale and visible threshold effects. W hen built together with other water& nbsp;treatment chemicals, it shows good&n bsp;synergistic effects.

The solid state of HEDP is  crystal powder, suitable for usage& nbsp;in winter and freezing districts.&nb sp;Because of its high purity, it&nb sp;can be used as cleaning agent&nbs p;in electronic fields and as additi ves in daily chemicals. 

Specification of HEDP:

Appearance

Colorless or light yellow trans parent liquid

White crystal powder

Active content (HEDP)%    58.0-62.0 89.0 min

Phosphorous acid (as PO33-)%  2.0 max 0.5 max

Phosphoric acid  (asPO43- )%  0.8 max 0.5 max

Chloride (as Cl-)%         &nb sp;0.01 max 0.01 max

pH (1%  solution)         &nb sp;   2 max 2 max

Density  (20 C)g/cm3         &nb sp;1.40 -

Fe ion ppm         &nb sp;      10 max 20 max

Colour APHA (Hazen)         &nb sp;40 max -

[Related Categories: Water Treatment ]
[Related Keywords: HEDP, HEDP Na, HEDP Na2 ]
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) (09/08/2008)

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

CAS No. 2809-21-4        &nbs p;           ;                    Dequest:2010

Molecular Formula:   C2H8O7P2 &nb sp;         &nbs p;    Molecular weight: 206.02

Structural Formula:

\"1-Hydroxy

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f surfaces. HEDP shows excellent scale and corrosion inhibition effects under temperature 250Ž. 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 Colorless or light yellow transparent liquid White crystal powder
Active content (HEDP)% 58.0-62.0 89.0 min
Phosphorous acid (as PO33-)% 2.0 max 0.5 max
Phosphoric acid  (asPO43- )% 0.8 max 0.5 max
Chloride (as Cl-)% 0.01 max 0.01 max
pH (1“ solution) 2 max 2 max
Density  (20Ž)g/cm3 1.40 -
Fe ion ppm 10 max 20 max
Colour APHA (Hazen) 40 max -

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: Normally In 250kg net Plastic Drum, IBC drum can also be used as required HEDP solid: 25kg inner liner polyethylene (PE) bag, outer plastic woven bag, or confirmed by clients.

Storage for ten months in room shady and dry place.

Safety Protection:

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

[Related Categories: Chemical Additives, Auxiliary ]
[Related Keywords: HEDP ]
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP) (09/08/2008)

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

CAS No. 2809-21-4        &nbs p;           ;                    Dequest:2010

Molecular Formula:   C2H8O7P2 &nb sp;         &nbs p;    Molecular weight: 206.02

Structural Formula:

\"1-Hydroxy

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f surfaces. HEDP shows excellent scale and corrosion inhibition effects under temperature 250Ž. 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 Colorless or light yellow transparent liquid White crystal powder
Active content (HEDP)% 58.0-62.0 89.0 min
Phosphorous acid (as PO33-)% 2.0 max 0.5 max
Phosphoric acid  (asPO43- )% 0.8 max 0.5 max
Chloride (as Cl-)% 0.01 max 0.01 max
pH (1“ solution) 2 max 2 max
Density  (20Ž)g/cm3 1.40 -
Fe ion ppm 10 max 20 max
Colour APHA (Hazen) 40 max -

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: Normally In 250kg net Plastic Drum, IBC drum can also be used as required HEDP solid: 25kg inner liner polyethylene (PE) bag, outer plastic woven bag, or confirmed by clients.

Storage for ten months in room shady and dry place.

Safety Protection:

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

[Related Categories: Chemical Additives, Auxiliary ]
[Related Keywords: HEDP ]
HEDP (12/29/2006)
Features: 1) Chemical name: 1- Hydroxy ethylidene (1, 1-diphosphonic acid) (HEDP) 2) Chemical structure: C2H8O7P2 3) Molecular weight: 206.03 4) Appearance: colorless to pale yellow viscous liquid Properties and typical value: 1) Active acid content: 58.0-62.0% 2) pH, 1% solution at 25°C: 2.0 max. 3) Density at 20°C: 1.42 - 1.48 g/cm3 4) Color (APHA): 80 max. 5) Iron, PPM: 25 max. 6) Chloride: 1.0% max. 7) Phosphorous acid: 4.5% max. Packing: 250kg per UN approved PE drum Applications: Scale inhibitors; oil field; cooling water and boiler treatment; industrial cleaners Other Price Terms: FOB, CIF, CFR Payment Terms: T/T
[Related Categories: Others ]
[Related Keywords: HEDP ]
HEDP (10/30/2006)
Features: 1) Product: HEDP (1-hydroxyethylidene-1,1-diphosphonic acid) 2) CAS no.: 2809-21-4 3) Molecular formula: C2H8O7P2 4) Molecular weight: 206.02 5) Melting point: 199°C 6) UN no.: 3265 Specifications: Applications: as scale inhibitor, deflocculant, sequestrant, water stabilizer in water treatment, pipeline, detergent Packing: 250kg/plastic drum nianhong Other Price Terms: FOB, CIF, CFR Payment Terms: L/C at sight, T/T, D/PSupply Ability: 500MT/month
[Related Categories: Organic Acid ]
[Related Keywords: HEDP ]
HEDP (10/02/2006)
Features: 1) Appearance: clear, colorless to pale yellow aqueous solution 2) Active content: 58.0 - 62.0% 3) PH (1% solution): 2 max. 4) Fe: 10ppm max. 5) Color (APHA): 30 max.
[Related Categories: Chemical Additives, Auxiliary ]
[Related Keywords: HEDP ]
HEDP (11/17/2005)
Specifications: Specification: Appearance: Colorless to pale yellow viscous transparent liquid. Active ingredient (as HEDP): 58.0%-62.0% Phosphorous acid (as PO3): 2.0%max Acetic acid: 1.0% max Iron (as Fe), ?¦??g/g (ppm): 20 max PH Value (1% water solution): 2 max Density (20???¦), g/cm3: 1.44-1.47 Colour (APHA): 80 max Packing and storage: 260kg in plastic drum. To be stored in cool dry places. Storage life 12 months. Other Price Terms: FOB  Shanghai
[Related Categories: Others ]
[Related Keywords: HEDP ]
1-hydroxyethylidene-1, 1- Diphosphonic Acid (HEDP) (10/27/2005)
Specifications: Item Specification Appearance pale yellow transparent liquid Active Content 58-62% Phosphorous Acid (as PO3) 2.0% max Iron (as Fe) 20ppm max PH Value (1% aqueous) 2.0 max Color, APHA 80 max Density( 20centigrade), g/cm3 1.44-1.47 Acetic Acid 1.0% max Standard Packing 290kgs net/200L poly drums
[Related Categories: Others ]
[Related Keywords: hydroxyethylidene, Diphosphonic, acid, HEDP ]
HEDP / ATMP (08/22/2005)
Specifications: We are the manufacturer of chemical products in China. We can supply you with best quality and competitive price. If you interest in this, please do not hesitive to contact with me. Specification: Appearance: Clear or yellow liquid HEDP% >= 50.0 PO 3 3- % >= 3.0 PO 4 3- % >= 1.0 Cl - >= 1.0 PH(1%) >= 2 Density(20c)g/cm 3 1.34-1.48
[Related Categories: Others ]
[Related Keywords: HEDP, ATMP ]
HEDP (1-Hydroxy ethylidene-1.1-diphosphonic acid) (07/24/2005)
Specifications: HEDP is a multifunctional phosphonate providing all the properties of polyphosphates, phosphate esters, polymers and chelating agents. HEDP is employed as a scale control agent for cooling water treatment, Besides, it can improve corrosion control, or inhibit iron fouling and assist dispersion of solids. HEDP is with the following key functions: Threshold effect Hydrolytic stability Sequestration Chlorine stability Crystal growth modification Application: Scale control for cooling water & boiler water treatment Scale & corrosion control for oilfield water treatment Bottle washing: prevent from scale, spotting and filming Textile industries: stabilized peroxide, improve bleaching performance
[Related Categories: Water Treatment ]
[Related Keywords: HEDP, hydroxy, Ethylidene, Diphosphonic, acid ]
HEDP (05/10/2005)
Specifications: We're professional manufacturer and exporter of industrial water treatment chemicals in Shandong China for many years. Our products include HEDP, ATMP, EDTMPA, EDTMP, DTPMP, PAA, PAAS, HPMA, MA_AA, AA/AMPS, EDTMPS, etc. Our annual output is about 10000M/T. We can offer quality products at much reasonable prices. Payment Terms: L/C,T/T Certification(s): ISO9001Supply Ability: 10000M/T
[Related Categories: Others ]
[Related Keywords: HEDP ]
HEDP (02/23/2005)
Specifications: Appearance:Clear, Colorless to pale yellow aqueous solution Active Content: 58.0 - 62.0% Phosphorous acid (as PO3 3-): 2.0% max Phosphoric acid (as PO4 3-): 0.8% max. PH (1% Water Solution): 2.0 max. Density (20C) g/cm3: 1.43-1.46 Iron: 10ppm max. Color (APHA): 80 max. Ca sequestration mg CaCO3/g: 480 min. Properties: The product shows good stability under high pH value, hardly being hydrolyzed.Its low toxicity could be easily turned out from the human body. The productworks effectively under the temperature of 200C. It can be combined withFe, Cu, Al, Zn ions forming chelate compounds. Due to its solubilization, it affectdissolving the surface oxidizing materials of the metals. Usage: This product is mainly used in boilers and heat exchanger pipe-lines as ascale remover and corrosion resistant agent. It can also be used as metal and non-metalcleaner, and as stabilizer and colour fixing agent in textile bleaching.
[Related Categories: Others ]
[Related Keywords: HEDP ]
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