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inquiryItems Standard Result Appearance Colorless or pale yellow transparent liquid Colorless transparent liquid Active c
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inquiryHEDP 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 inhibi
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inquiryHEDP 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 inhibit
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inquiryAbout Product Details Item Specification Test Results Appearance White crystalline powder Conform
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inquiry1-Hydroxyethylidene-1,1-diphosphonic acid Basic information Product Name: 1-Hydroxyethylidene-1,1-diphosphonic acid Synonyms: (1-hydroxyethylene)diphosphonicacid;(1-hydroxyethylidene)bis
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inquiryChemical Name:HEDP 90% powder Synonyms: 1-Hydroxyethylidene-1,1-diphosphonic acid CAS No.: 2809-21-4 Molecular Fomula:C2H8O7P2 Chemical Structure: Molecular weight: M=206.03 EINECS No.:220-552-8 Appearance:White crystal Appearance
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inquiry1-hydroxyethylidene-1,1-diphosphonic acid hedp CAS:2809-21-4 Specification Items Index Appearance Clear, Colorless to pale yellow aqueous solution White crystal powder Active content (HEDP)% 6
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inquiry(1-hydroxyethylidene)bisphosphonic acid tetramethyl ester
1-hydroxyethylene-(1,1-diphosphonic acid)
Conditions | Yield |
---|---|
With hydrogenchloride | 100% |
Conditions | Yield |
---|---|
Stage #1: acetyl chloride With tris(trimethylsilyl) phosphite at 25℃; Stage #2: In methanol at 25℃; for 1h; | 98% |
With phosphonic Acid at 120℃; | |
Stage #1: acetyl chloride With tris(trimethylsilyl) phosphite Cooling with liquid nitrogen; Stage #2: With methanol for 4h; |
Conditions | Yield |
---|---|
With (1-acetyloxyethylidene)-1,1-bisphosphonic acid In water at 75 - 110℃; for 5h; | 97% |
With phosphonic Acid; phosphorus trichloride In chlorobenzene at 100℃; for 3h; Inert atmosphere; | 87% |
With P4O6 heating, other monocarboxylic acids; |
phosphorus(III) oxide
acetic acid
1-hydroxyethylene-(1,1-diphosphonic acid)
Conditions | Yield |
---|---|
With water at 150℃; under 15001.5 Torr; Concentration; Temperature; Pressure; | 97% |
1-hydroxyethylene-(1,1-diphosphonic acid)
Conditions | Yield |
---|---|
With methanol for 1h; | 90% |
Conditions | Yield |
---|---|
With hydrogenchloride; P4O6; boron trifluoride 1.) 20 deg C to 25 deg C, 20 h, 2.) 10 h; | 68% |
Conditions | Yield |
---|---|
With phosphonic Acid; phosphorus trichloride In sulfolane; water 1.) 40 deg C to 60 deg C, 1 h 30 min, 2.) 108 deg C to 113 deg C, 6 h; | 39% |
acetamide
ethyl 2-oxocyclohexane carboxylate
A
1-hydroxyethylene-(1,1-diphosphonic acid)
B
2-amino-2-phosphonocyclohexanecarboxylic acid
C
ammonium 1-aminoethane-1,1-diphosphonate
D
α-amino cyclohexylphosphonic acid
Conditions | Yield |
---|---|
Stage #1: acetamide With acetyl chloride In acetic acid for 0.25h; Cooling with ice; Stage #2: ethyl 2-oxocyclohexane carboxylate In acetic acid at 20℃; Cooling with ice; Further stages; | A 4 %Spectr. B 30% C 21 %Spectr. D 18% |
1-pentyl acetate
A
1-hydroxyethylene-(1,1-diphosphonic acid)
B
(Pentyloxy-phosphono-methyl)-phosphonic acid
Conditions | Yield |
---|---|
With hydrogenchloride; P4O6; boron trifluoride 1.) 50 deg C, 4 h, 2.) 6 h; | A 22% B 13% |
acetamide
methyl 2-oxocyclopentane-1-carboxylate
A
1-hydroxyethylene-(1,1-diphosphonic acid)
B
ammonium 1-aminoethane-1,1-diphosphonate
C
α-amino cyclopentylphosphonic acid
D
2-Amino-2-phosphono-cyclopentanecarboxylic acid
Conditions | Yield |
---|---|
Stage #1: acetamide With acetyl chloride In acetic acid for 0.25h; Cooling with ice; Stage #2: methyl 2-oxocyclopentane-1-carboxylate With phosphorus trichloride In acetic acid at 20℃; Cooling with ice; Further stages; | A 4% B 20% C 3 %Spectr. D 64 %Spectr. |
(1-Hydroxyethylidene)-1,1-bisphosphonic acid tetraethyl ester
1-hydroxyethylene-(1,1-diphosphonic acid)
Conditions | Yield |
---|---|
Stage #1: (1-Hydroxyethylidene)-1,1-bisphosphonic acid tetraethyl ester With trimethylsilyl bromide at 0℃; for 1h; Stage #2: With methanol at 0℃; |
tetrakis(O-trimethylsilyl)hydroxyethylidenediphosphonic acid
1-hydroxyethylene-(1,1-diphosphonic acid)
Conditions | Yield |
---|---|
With ethanol for 0.5h; |
formaldehyd
acetic acid
A
1-hydroxyethylene-(1,1-diphosphonic acid)
B
hydroxymethylphosphonic acid
Conditions | Yield |
---|---|
Stage #1: formaldehyd; acetic acid at 115℃; for 2h; Stage #2: With phosphorus trichloride at 20℃; for 6h; Reflux; Stage #3: With water for 2.5h; Reflux; |
1-hydroxyethylene-(1,1-diphosphonic acid)
Conditions | Yield |
---|---|
With water for 2.5h; Reflux; |
(1-acetoxyethane-1,1-diyl)bis(phosphonic acid)
1-hydroxyethylene-(1,1-diphosphonic acid)
Conditions | Yield |
---|---|
With ethanol at 20 - 125℃; for 1h; Temperature; |
Conditions | Yield |
---|---|
In water | 99% |
Conditions | Yield |
---|---|
In water hydrothermal treatment of a mixt. of RuCl3*xH2O, diphosphonic-compound and H2O, adjusted by NH2(CH2)4NH2 to pH - 2.85 at 140°C for 6 days; elem. anal.; | 98% |
Conditions | Yield |
---|---|
With glacial acetic acid In water several d; decantation, washing (aq. HOAc), filtration, drying in air at room temp.; elem. anal.; | 98% |
In water slow evapn., filtration, drying in air at room temp.; elem. anal.; | 93% |
Conditions | Yield |
---|---|
In water slow evapn., filtration, drying in air at room temp.; elem. anal.; | 97% |
With glacial acetic acid In water several d; decantation, washing (aq. HOAc), filtration, drying in air at room temp.; elem. anal.; | 97% |
Conditions | Yield |
---|---|
In water for 12h; | 97% |
Conditions | Yield |
---|---|
In water for 12h; | 97% |
1-hydroxyethylene-(1,1-diphosphonic acid)
Conditions | Yield |
---|---|
With barium(II) chloride In potassium hydroxide for 120h; | 96% |
zinc(II) nitrate
1-hydroxyethylene-(1,1-diphosphonic acid)
Conditions | Yield |
---|---|
With sodium hydroxide In water components mixing (molar ratio Zn:org. acid=1:2), aq. NaOH addn. (molar ratio NaOH:org. acid=3.5-4.5), mixt. stirring continuously for 14 d, pptn.; ppt. thoroughly pressing free from mother liquor, washing (alcohol), drying at room temp.; elem. anal.; thermogravimetric anal.; | 96% |
1-hydroxyethylene-(1,1-diphosphonic acid)
ethane-1-hydroxy-1,1-diphosphonic acid tetrasodium salt
Conditions | Yield |
---|---|
With GeO2 In water High Pressure; stirred at ambient temp., heated at 150°C; washed (H2O), filtered, air-dried at room temp.; elem. anal.; | 96% |
Conditions | Yield |
---|---|
In water for 12h; | 96% |
1-hydroxyethylene-(1,1-diphosphonic acid)
4,6,10,12,16,18,22,24-octahydroxy-5,11,17,19-tetrakis(dimethylaminomethyl)-2,8,14,20-tetramethylpentacyclo[19.3.1.13,7.19,13.115,19]octacosa-1(25),3,5,7(28),9,11,13(27),15,17,19(26),21,23-dodecaene
Conditions | Yield |
---|---|
In water for 12h; | 96% |
1-hydroxyethylene-(1,1-diphosphonic acid)
N,N-dimethyl-formamide
Conditions | Yield |
---|---|
In ethanol; water at 160℃; for 72h; pH=3.01; High pressure; | 93.7% |
1-hydroxyethylene-(1,1-diphosphonic acid)
Conditions | Yield |
---|---|
In various solvent(s) | 92% |
Conditions | Yield |
---|---|
at 150 - 230℃; for 72h; pH=1-2; | 92% |
1-hydroxyethylene-(1,1-diphosphonic acid)
ethane-1-hydroxy-1,1-diphosphonic acid tetrasodium salt
Conditions | Yield |
---|---|
With GeO2 In water High Pressure; stirred for 0.5 h at ambient temp., heated at 150°C for 3 d; washed (H2O), filtered, air-dried at room temp.; elem. anal.; | 91% |
1-hydroxyethylene-(1,1-diphosphonic acid)
Conditions | Yield |
---|---|
In various solvent(s) | 89% |
Conditions | Yield |
---|---|
In water High Pressure; mixt. CoCl2*6H2O, 50% hedpH4, and H2O adjusted with 1,4-butylenediamine to pH 4.83 was treated hydrothermally at 140°C for 45 h; elem. anal.; | 89% |
Conditions | Yield |
---|---|
In water at 90℃; for 2h; | 89% |
1,6-Hexanediamine
1-hydroxyethylene-(1,1-diphosphonic acid)
guanidine hydrogen carbonate
Conditions | Yield |
---|---|
Stage #1: 1,6-Hexanediamine; guanidine hydrogen carbonate In 1,3,5-trimethyl-benzene at 165℃; for 8h; Stage #2: 1-hydroxyethylene-(1,1-diphosphonic acid) | 88% |
1-hydroxyethylene-(1,1-diphosphonic acid)
ethane-1-hydroxy-1,1-diphosphonic acid tetrasodium salt
Conditions | Yield |
---|---|
In water High Pressure; stirred at ambient temp. for 0.5 h, heated at 150°C for 3 d; washed (H2O), filtered, air-dried at room temp.; elem. anal.; | 88% |
Conditions | Yield |
---|---|
With sodium hydroxide In water at 80 - 95℃; | 88% |
Conditions | Yield |
---|---|
In water at 20℃; for 48h; pH=8 - 9; | 88% |
Conditions | Yield |
---|---|
With NaF In water mixt. MnCl2*4H2O, hedpH4, NaF, and water was adjusted to pH 4 with 1,5-diaminopentane and kept in autoclave at 110°C for 2 d; react. mixt. was cooled to room temp.; elem. anal.; | 87% |
1-hydroxyethylene-(1,1-diphosphonic acid)
1,1,1,3,3,3-hexamethyl-disilazane
tetrakis(O-trimethylsilyl)hydroxyethylidenediphosphonic acid
Conditions | Yield |
---|---|
at 25 - 140℃; | 87% |
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