Products Description of Diethylenetriaminepenta(methylene-phosphonic acid) CAS#15827-60-8
Diethylenetriaminepenta(methylene-phosphonic acid), commonly known as DTPMPA, has molecular formula C₉H₂₈N₃O₁₅P₅ and molecular weight of 573.2. It is normally supplied as 50% aqueous solution, appearing as amber to brown transparent viscous liquid with mild acidic odor. The density ranges from 1.35–1.45 g/cm³ at 20°C, and pH of 1% aqueous solution is below 2.0.
This organophosphonic chelating agent is fully water-soluble and features outstanding thermal stability, maintaining performance above 210°C. It can strongly chelate metal ions and inhibit scale formation under alkaline and high-temperature environments. It is widely used as scale inhibitor and corrosion inhibitor for circulating cooling water, boiler water and oilfield water treatment systems.
Diethylenetriaminepenta(methylene-phosphonic acid) Chemical Properties
| Boiling point | 1003.3±75.0 °C(Predicted) |
| density | 1.35–1.45 g/cm³ at 20°C |
| vapor pressure | 0Pa at 25℃ |
| storage temp. | Hygroscopic, -20°C Freezer, Under inert atmosphere |
| solubility | Aqueous Base (Sparingly), Water |
| form | Viscous liquid |
| pka | 0.59±0.10(Predicted) |
| color | Amber to brown |
| Water Solubility | 500g/L at 25℃ |
| BRN | 2068968 |
| InChIKey | DUYCTCQXNHFCSJ-UHFFFAOYSA-N |
| LogP | -3.4 |
| CAS DataBase Reference | 15827-60-8(CAS DataBase Reference) |
| EPA Substance Registry System | Phosphonic acid, [[(phosphonomethyl)imino]bis[2,1-ethanediylnitrilobis(methylene)]]tetrakis- (15827-60-8) |
| Hazard Codes | Xi,C |
| Risk Statements | 36/37/38-51/53-41-37/38 |
| Safety Statements | 26-36-33-28-23-16-9-39 |
| RIDADR | UN 1789 8/PG 2 |
| WGK Germany | - |
Product Application of Diethylenetriaminepenta(methylene-phosphonic acid) CAS#15827-60-8
DTPMPA is a high-performance corrosion and scale inhibitor for circulating cooling water and boiler water systems. It is especially suitable for closed circulating systems including power plant ash flushing water, along with alkaline circulating cooling water. Within such systems, it delivers efficient scale and corrosion inhibition performance without pH adjustment.
Moreover, it can act as a corrosion and scale inhibitor for oilfield injection water, cooling water and boiler water containing high concentrations of barium carbonate. It also works as a stabilizer for peroxides and chlorine dioxide biocides.Whether applied independently or formulated into composite blends, no supplementary dispersant is required. The formation of sludge and sediments can still be kept at an extremely low level.
