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Potassium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP.K2)

CAS No. 67953-76-8 EINECE NO. 267-956-0
Molecular Formula C2H6O7P2K2 Molecular Weight 282
Structural Formula

HEDP.K2 Structural Formula

Product Features

HEDP.K2 is potassium salt of HEDP (Hydroxy Ethylidene 1,1-Diphosphonic Acid).HEDP.K2 has high solubility at neutral pH levels relative to sodium salts. HEDP.K2 is a good scale inhibitor for calcium carbonate.

Technical Specification

Itas Index
Appearance Colorless to yellowish transparent liquid
Active content(HEDP), % 26.0-30.0
Total phosphoric acid (PO43-), % 24.7-26.7
Fe, mg/L 20 max
Density (20℃), g/cm3 1.30-1.40
pH (1% water solution) 6.0-8.0

Applications & Usage

HEDP.K2 can be used in metal corrosion inhibitor, antifouling agent of swimming pool, metal cleaning, volume cleaning, iron dust controlling, metal pretreatment, low pressure boiler water treatment and circulating water treatment, etc.

Scale and Corrosion inhibition Performance

CaCO3 inhibition CaSO4 inhibition Ca3(PO4)2 inhibition BaSO4 inhibition CaF2 inhibition
Excellent Poor Very Good Good Good
Calcium Tolerance Iron Control Sequestration Steel corrosion inhibition
Poor Yes Good Very Good

Package & Storage

HEDP.K2 Liquid
25L Drum 200L Drum 1000L IBC ISO Tank
25kg Bag 200L Drum packaging
Storage for ten months in shady room and dry place.

Hazard & Safety Precaution

Hazard Information Safety Precaution

Not regulated

Wear protective gloves Wear protective goggles Wear protective clothing

Once contacted with eye and skin, flush with plenty of clean water

Alternative Name / Synonyms

  1. Disodium Etidronate Hydrate;
  2. Disodium dihydrogen bisphosphonate (1-hydroxyethylidene)bisphosphonate

HEDP.Na4 related products :

  1. Disodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid
  2. 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)
  3. Disodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP•Na2)
  4. Tetra Sodium Salt of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP•Na4)