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Phosphonates Antiscalants, Corrosion Inhibitors and Chelating Agents
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Polycarboxylic Antiscalant and Dispersant
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Hepta Sodium Salt of Diethylene Triamine Penta (Methylene Phosphonic Acid) (DTPMP•Na7)

CAS No. 68155-78-2 EINECE NO. 268-990-9
Molecular Formula C9H21O15N3P5Na7 Molecular Weight 727
Structural Formula

DTPMP.Na7 Structural Formula

Product Features

DTPMP.Na7 is neutralized DTPMPA. DTPMP.Na7 works well as a scale inhibitor and dispersing agent for use in industrial water treatment programs.When used at high alkali and temperatures (above 210°C) DTPMP.Na7 is more effective than other phosphonates. DTPMP.Na7 is a very good inhibitor of the precipitation of barium sulfate.

Technical Specification

Parameter Standard
Appearance Umber transparent liquid
Active content (DTPMPA), % 31.5-33.5 24.0-26.0
Active content (DTPMP•Na7), % 40.0-42.5 30.5-33.0
Chloride (as Cl-) % 5.0max 5.0max
Fe, mg/L 20 max 20 max
pH (1% water solution) 7.0-9.0 7.0-9.0
Density (20℃), g/cm3 1.25 min 1.24-1.34

Applications & Usage

DTPMP·Na7 can be used as a scale inhibitor, efficient chelating agent, and excellent BaSO4 scale inhibitor. DTPMP·Na7 is widely used in cooling water treatment, stabilizer for peroxide bleaching, washing aids, municipal and industrial clean water, and geothermal heating. Water treatment, oil field scale inhibition.

Scale and Corrosion inhibition Performance

CaCO3 inhibition CaSO4 inhibition Ca3(PO4)2 inhibition CaC2O4 inhibition BaSO4 inhibition
Very Good Excellent Very Good Very Good Very Good
Calcium tolerance Iron Control Sequestration Steel corrosion inhibition
Good Yes Excellent Very Good

Package & Storage

DTPMP.Na7 Liquid
25L Drum 200L Drum 1000L IBC ISO Tank
Storage for ten months in shady room and dry place.

Hazard & Safety Precaution

Hazard Information Safety Precaution

Not regulated

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

DTPMP.Na7 related products

  1. Hepta sodium salt of Diethylene Triamine Penta (Methylene Phosphonic Acid)
  2. Sodium salt of Diethylene Triamine Penta (Methylene Phosphonic Acid) (DTPMP•Nax)
  3. Diethylene Triamine Penta (Methylene Phosphonic Acid) (DTPMPA)