Diethylenetriamine penta(methylene phosphonic acid) heptasodium salt
CAS 68155-78-2
EC 268-990-9
Formula C9H28N3O15P5.7Na
MW 727.07 g/mol
Chelating Agents Water TreatmentPulp & PaperOil, Gas & EnergyMining & MetalsTextile, Leather & Paper Chelation & SequestrationCorrosion InhibitionpH Regulation & Buffering
Description
Diethylenetriamine penta(methylene phosphonic acid) heptasodium salt, CAS 68155-78-2, is a phosphonate chelating agent supplied as an aqueous solution. It is commercially known under designations including DTPMPA.NA7, Dequest FS 0536N, and Dtpmp 7Na. No E-code applies to this substance.
In water treatment and cooling systems, it inhibits scale formation by binding calcium, magnesium, and iron ions before they precipitate onto surfaces. In textile and paper processing, it sequesters heavy metal contaminants that would otherwise interfere with bleaching and dyeing chemistry. The heptasodium salt form provides improved solubility and handling convenience in alkaline process conditions.
This product is supplied under REACH compliance and is available in aqueous solution grade suitable for industrial formulation. Procurement teams should confirm concentration specification and packaging format directly, as these vary by production batch and regional distribution agreement.
In water treatment and cooling systems, it inhibits scale formation by binding calcium, magnesium, and iron ions before they precipitate onto surfaces. In textile and paper processing, it sequesters heavy metal contaminants that would otherwise interfere with bleaching and dyeing chemistry. The heptasodium salt form provides improved solubility and handling convenience in alkaline process conditions.
This product is supplied under REACH compliance and is available in aqueous solution grade suitable for industrial formulation. Procurement teams should confirm concentration specification and packaging format directly, as these vary by production batch and regional distribution agreement.
Physical Properties
| Melting Point | -13°C |
| Color | amber |
| Form | aqueous solution |
| pH | 6.0-8.0 (1% in H2O) |
Safety & Handling (Learn More)
Warning GHS07
H
H319
P
P280P264+P265P337+P317P305+P351+P338
Trade & Regulatory
| Storage Class | 10 - Combustible liquids |
| WGK (Germany) | 3 |
Other Names
DTPMP heptasodium saltFS 0536NDtpmp 7NaDTPMPA.NA7heptasodiumDequest FS 0536NHoesch Phos DET 32DTPMP heptasaodium saltSODIUM AMINO ETHYL PHOSPHATEDiethylene triamine pentamethylphosphonate heptosan
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