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

1-hýdroxýetýliden-1,1-dífosfónsýra (HEDP)

CAS nr. 2809-21-4

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Ítarleg kynning Read More About 1 hydroxy ethylidene 1 1 diphosphonic acid hedp1

CAS No. 2809-21-4

Molecular Formula: C₂H₈O₇P₂ Mólþyngd: 206,02

Byggingarformúla:

Read More About corrosion scale inhibitor

Eiginleikar:

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 sýnir framúrskarandi mælikvarða og tæringarhamlandi áhrif við hitastig 250 ℃. HEDP hefur góðan efnafræðilegan stöðugleika við hátt pH gildi, erfitt að vatnsrofna og erfitt að sundrast við venjulegar birtu- og hitaaðstæður. Sýru-/alkalí- og klóroxunarþol þess er betra en annarra lífrænna fosfórsýra (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 ástand af 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.

Tæknilýsing:

Hlutir	Vísitala
Útlit	Tær, litlaus til fölgul vatnslausn	Hvítt kristalduft
Virkt efni (HEDP), %	58-62	90,0 mín
Active content (HEDP·H₂O), %	-	98,0 mín
Fosfórsýra (sem PO₃^3-), %	2,0 hámark	0,8 hámark
Phosphoric acid (as PO₄^3-), %	0,8 hámark	0,5 hámark
Klóríð (sem Cl^-)%	0,02 hámark	0,01 hámark
pH (1% vatnslausn)	2,0 hámark	2,0 hámark
Þéttleiki (20℃), g/cm³	1.40 mín	-
Fe, mg/L	20,0 hámark	10,0 hámark
Litur APHA (Hazen)	40,0 hámark	-
Ca binding (mg CaCO₃/g)	500,0 mín

Notkun:

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.

Pökkun og geymsla:

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

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

Geymsla í tólf mánuði á skuggum og þurrum stað.

Öryggi og vernd:

HEDP er súrt. Gefðu gaum að vinnuvernd meðan á notkun stendur. Forðist snertingu við augu og húð. Ef það skvettist á líkamann skal skola strax með miklu vatni.