Possessiones:

HEDP est corrosio organophosphoric acidorum inhibitoris. Potest cum Fe, Cu, et Zn iones chelate com- positiones firmare ad chalanden. Materias oxidizatas in his superficiebus metallorum dissolvere potest. HEDP praestantes scala et corrosio inhibitionis effectus sub temperatus 250℃ ostendit. HEDP stabilitatem chemicam bonam sub magni pretii pH habet, difficile hydrolyzari, et difficile sub ordinariis lucis et caloris conditionibus resolutum. Eius acidum/alcali et oxidationis chlorinae tolerantiae meliores sunt quam ceterarum acida organophosphorica (sal). 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.

In solidum statum 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.

Specificatio:

Items	Index
Aspectus	Patet, hyalina ad solutionem aqueam pallide flavis	Crystallum album pulveris
Active content (HEDP), %	58-62	90.0 min
Agens content (HEDP·H₂O), %	-	98.0 min
Acidum phosphoricum (ut PO₃^3-), %	2.0 max	0.8 max
Acidum phosphoricum (ut PO₄^3-), %	0.8 max	0.5 max
Chloride (ut Cl*^-)%	0.02 max	0.01 max
PH (I% aqua solution)	2.0 max	2.0 max
Densitas (20℃), g/cm³	1.40 min	-
Fe, mg/L	20.0 max	10.0 max
Color APHA (Hazen)	40.0 max	-
Ca Sequestratio (mg CaCO₃/g)	500.0 min

Consuetudinem:

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.