1-Hydroxy Ethylidene-1,1-Diphosphonic Acid/HEDP/HEDPA

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CAS NO.： 2809-21-4

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Specification： Liquid: ≥ 60%; Solid: ≥ 89%

Documentation：

COA

COA2

Lead Time： In Stock

Max Capacity： -

Pallets Packing	20'FCL		40'FCL
Pallets Packing	With	Without	With	Without
250KG/Plastic Drum	--	20 MT	--	--
25KG/Woven Bag	--	--	--	--

Product Detail

Properties

HS-311 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)

Product name	HS-311 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)
CAS No.	2809-21-4
Alias	HEDPA
Molecular Formula	C2H8O7P2
Molecular Weight	206.02
Structural Formula
Properties & Use	It is an organic phosphoric acid series anti-incrustation corrosion inhibitor. It has good stability in high pH-value conditions; has good resistance to acids/alkali and oxidation.
Properties & Use	HEDP is widely used for electrical power, chemical engineering, metallurgy and chemical fertilizer industries.
Specifications	Item	Details
Conform to HG/T 3537-1999	Item	HG/T 3537-1999
	Appearance	colorless or light yellow transparent liquid	white powdered solid
	Active ingredient (HEDP)%≥	60	89
	Phosphorous acid（PO33-）% ≤	2	0.8
	Phosphoric acid （PO43-）% ≤	0.8	0.5
	Chloride （Cl-）% ≤	0.01	0.01
	pH-value (1%aqueous solution) ≤	2	2
	Density（20℃）g/cm3≥	1.4	——
	Cacium chelating value mg/g	500	——
	Iron (2+) content mg/L ≤	10	5
	Active ingredient (HEDP H2O)%≥	——	98
Packing & Storage	HEDP liquid: in plastic drum, 250Kg; HEDP solid: in a plastic woven bag lined with PE film, net wt.25kg/bag, or upon users' demand. Stored in cool and draughty place. Shelf life is 12 months.
Safety Protection	Avoid contact with skin and eyes; wash with plenty of water.

Properties

Pure etidronic acid is white crystal, industrial etidronic acid is colorless to light yellow transparent liquid, soluble in water, methanol and ethanol. Hydroxyethylidene diphosphonic acid is a kind of chemical raw material, which is often used in industrial water treatment, household cleaning products and personal care products. This product is the main material of cyanide free electroplating. It is used to prepare cyanide free copper electroplating solution. The copper coating directly plated on sodium iron has good adhesion, smooth coating and good color. In addition, hydroxyethylidene diphosphonic acid is often used as scale and corrosion inhibitor in boiler water, circulating water and oilfield water injection treatment. It is generally combined with polyhydroxy acid scale inhibitor and dispersant, and can also be used as color fixing agent and hydrogen peroxide stabilizer in bleaching and dyeing industry.

CAS No.

2809-21-4

Formula

C2H8O7P2

Molecular Mass

206.02800

Exact Mass

205.97500

PSA

154.91000

Logp

-0.99220