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

CAS Numera 2809-21-4

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Fa'amatalaga

Fa'ailoga

Fa'atomuaga auiliili Read More About 1 hydroxy ethylidene 1 1 diphosphonic acid hedp1

CAS No. 2809-21-4

Molecular Formula: C₂H₈O₇P₂ mamafa mole: 206.02

Fua Fa'atatau:

Read More About corrosion scale inhibitor

Meatotino:

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 o lo'o fa'aalia ai le fua lelei ma le fa'aleagaina o a'afiaga i lalo ole vevela 250℃. HEDP o loʻo i ai le mautu kemisi lelei i lalo o le maualuga o le pH, faigata ona faʻafefeteina, ma faigata ona pala i lalo o le malamalama masani ma le vevela. O lona fa'apalepale o le fa'ama'i/alkali ma le chlorine e sili atu nai lo isi vaila'au organophosphoric (masima). 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.

O le tulaga mautu o 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.

Fa'amatalaga:

Aitema	Fa'asinomaga
Fa'aaliga	E manino, e leai se lanu i le samasama samasama vaifofo vai	Pa'epa'e tioata pa'epa'e
Mea gaogao (HEDP), %	58-62	90.0 min
Active content (HEDP·H₂O), %	-	98.0 min
Phosphorous acid (pei o PO₃^3-), %	2.0 maualuga	0.8 maualuga
Phosphoric acid (as PO₄^3-), %	0.8 maualuga	0.5 maualuga
Chloride (pei o Cl^-)%	0.02 maualuga	0.01 maualuga
pH (1% vaifofo)	2.0 maualuga	2.0 maualuga
Malosi (20℃), g/cm³	1.40 min	-
Fe, mg/L	20.0 maualuga	10.0 maualuga
Lanu APHA (Hazen)	40.0 maualuga	-
Ca Sequestration (mg CaCO₃/g)	500.0 min

Fa'aoga:

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.

afifiina ma teuina:

HEDP liquid: 200L plastic drum,IBC(1000L),customers’ requirement.

HEDP solid: 25kg/bag,customers’ requirement.

Teuina mo le sefululua masina i le potu paolo ma matutu.

Saogalemu ma puipuiga:

O le HEDP o le acidic. Fa'alogo lelei ile puipuiga o tagata faigaluega ile taimi ole taotoga. Aloese mai le fa'afeso'ota'i ma mata ma le pa'u. Afai e sausau i luga o le tino, fufulu vave i le tele o vai.