Chelating Agents
REACH
Diethylenetriamine penta(methylene phosphonic acid) heptasaodium salt
CAS Number
68155-78-2
EC Number
268-990-9
What is Diethylenetriamine penta(methylene phosphonic acid) heptasaodium salt?
Diethylenetriamine penta(methylene phosphonic acid) heptasodium salt (CAS 68155-78-2), abbreviated DTPMP·Na7, is a phosphonate chelating agent in alkaline salt form.
Where is Diethylenetriamine penta(methylene phosphonic acid) heptasaodium salt used?
- Water treatment: controls calcium carbonate and calcium sulfate
- Cooling towers, boilers and reverse osmosis: manages barium sulfate scale at low dosage
- Textile and leather processing: deactivates metal ions that interfere with dyeing
- Oilfield operations: injected into production lines and injection water systems to prevent mineral scale deposition that reduces flow rates
- Pulp and paper: stabilizes peroxide in bleaching sequences and prevents metal-catalyzed decomposition
- It functions by sequestering hardness ions and inhibiting scale and corrosion.
Commercial specifications
- Active content typically around 40% or 50% by weight
- Bulk liquid supply in IBC containers or road tankers
Other Names (Synonyms)
Heptasodium diethylenetriaminepentamethylenephosphonate|Phosphonic acid, p,p′,p′′,p′′′-[[(phosphonomethyl)imino]bis[2,1-ethanediylnitrilobis(methylene)]]tetrakis-, sodium salt (1:7)|Heptasodium;[bis[2-[[hydroxy(oxido)phosphoryl]methyl-(phosphonatomethyl)amino]ethyl]amino]methyl-hydroxyphosphinate|Diethylenetriamine penta(methylene phosphonic acid) heptasodium salt
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What are the physical properties of Diethylenetriamine penta(methylene phosphonic acid) heptasaodium salt?
Melting Point -13°C
Color amber
Form aqueous solution
pH 6.0-8.0 (1% in H2O)
How is Diethylenetriamine penta(methylene phosphonic acid) heptasaodium salt classified and handled safely? Learn More
Warning
GHS07· Irritant
Hazard Statements
H319 Causes serious eye irritation
Precautionary Statements
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P264+P265 Wash … thoroughly after handling.
P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Which trade and regulatory codes apply to Diethylenetriamine penta(methylene phosphonic acid) heptasaodium salt?
Storage Class 10 - Combustible liquids
WGK (Germany) 3