Na DTPMP, SODIUM DIETHYLENETRIAMINE PENTAMETHYLENE PHOSPHONATE, 32%, L

Parameter	Attribute
DTPMP	Diethylen triaminopenta (methylene phosphonate), [[(phosphonomethyl)imino]di[(ethylennitrile)di (methylene)]]tetrakisphosphate acid, sodium salt
Formula	C9H27N3O15P5 x Na
Structure
IUPAC	sodium hydrogen [10,10-dihydroxy-10-oxido- 2,5,8-tris(phosphonomethyl)-2,5,8-triaza-10-phosphadec-1-yl]phosphonate
INCI	SODIUM DIETHYLENETRIAMINE PENTAMETHYLENE PHOSPHONATE
CAS	22042-96-2
Molar mass	608.20g/mol
Density	1,32 g/cm3 (20 °C)
Solubility	Miscible in water in any ratio

DTPMPs have excellent chelating properties and are more effective at inhibiting sedimentation (deposition) on membranes than polyphosphates. It is very effective in inhibiting sedimentation in aqueous systems. DTPMP is used as a stabilizer for peroxides. Stable at both high pH and high electrolyte concentrations and at high temperatures. Particularly effective in binding barium ions and in preventing the precipitation of highly stable barium sulphate (BaSO₄).

In the cleaning industry, diethylene triamine penta (methylene phosphonate) is used as a stabilizer in various types of peroxide-based bleaches and detergents. It is also widely used as a detergent or as a component in professional dishwashing liquids or membrane surface cleaners

In the heating industry, DTPMP is used as a metal ion binder in heating or refrigeration systems to prevent the formation of lime scale, both calcium carbonate and calcium sulphate and especially barium sulphate. DTPMP is used where there is a high risk of barium sulphate deposits forming, as once they form and settle on surfaces they are virtually impossible to remove with any acidic detergents or acid solutions. DTPMP is also used as a very effective corrosion inhibitor in heat transfer fluids, but its use is limited by phosphate and amine groups which, when released into nature, promote eutrophication. Recommended application rates are 5-15 mg/L.

In swimming pools, DTPMP is used not only as a lime inhibitor but mainly as an active oxygen stabilizer. DTPMP allows the peroxide to remain stable for longer, resulting in longer water clarity in the pool, and a lower dosage of active oxygen agents is required to maintain adequate oxygen levels in the pool. DTPMP acts as a deflocculant and should not be used with flocculants as the phosphonate binds the flocculant and renders both inactive.

In the weaving industry and in fabric dyeing, DTPMP is used as an additive to dye baths to bind metal ions (sequestrant), to allow better penetration of the dye into the fabric, and to keep the color intact. DTPMP is used in combination with ferric ions to form a complex compound which, when applied to polyester fiber, produces a non-flammable fabric. Other fibers can also be impregnated with the complex to make them non-flammable or low-flammable.

In water treatment, diethylene triamine penta (methylene phosphonate) is used in the production of distilled water by reverse osmosis as a lime inhibitor. DTPMP binds calcium, magnesium and barium ions and prevents the formation of calcium sulphate and, in particular, barium sulphate, so that the membrane remains free of clogging and does not require additional cleaning or washing. It is advisable to use DTPMPs in areas where there is barium in the feed water, as once barium sulphate precipitates, it is virtually impossible to remove it from the membranes, thus severely reducing the life of the membranes, and increasing the need for servicing and replacing them. DTPMPs are often present in membrane cleaners. The advantage of its use is that the compound is non-toxic.

In agriculture, DTPMP is used as an ingredient or as a key component of complex fertilizers, pesticides or soil conditioners. This phosphonate, with its very strong chelating properties, helps to keep the metal ions in an active form, preventing them from reacting with inorganic anions in the environment, such as carbonates, phosphates, etc., and going into a solid, inactive form. As DTPMP is an organic compound with very strong surface wetting properties, it greatly facilitates the penetration of the active substances through the leaves and the transport to the correct location in the plant cells. In addition, both nitrogen and phosphorus elements are fed to the plants and soil bacteria, thus increasing the NPK value.

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