Octaammonium (ethane-1,2-diylbis(nitrilobis(methylene)))tetrakisphosphonate
Synonyms
Phosphonic acid, (1,2-ethanediylbis(nitrilobis(methylene)))tetrakis-, octaammonium salt;
Phosphonic acid, P,P',P'',P'''-(1,2-ethanediylbis(nitrilobis(methylene)))tetrakis-, ammonium salt (1:8);
Category
Zwitterionic Surfactant
> Phosphonic Acid Type
Chemical Numbering System
CAS: 68901-17-7
EINECS: 272-659-4
Molecular Formula & Molecular Weight
Molecular Formula: C6H44N10O12P4; C6H20N2O12P4.8H3N
Molecular Weight: 572.37
Structure
Properties
Appearance (1), white solid.
Solubility soluble in water.
Stability stable. Under alkaline condition, ammonia is released.
Risk Solid form: irritation, irritation to skin, eye, respiratory system.
GHS label: 
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent anticorrosive, chelating abilities. The best chelating ability to copper ion.
Synthesis
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Solid |
|
|
Actives, %, ≥ |
95.0 |
Test Methods
(1), Actives
GB/T 13173 Surface active agents -- Detergents -- Testing methods
2, Hazardous substances indexes
|
Item |
Hazardous substances indexes |
|
Solid |
|
|
Heavy metals (as Pb), mg/kg, ≤ |
20 |
|
As, mg/kg, ≤ |
3 |
Test Methods
(1), Heavy metals (as Pb)
Safety and Technical Standards for Cosmetics (2015 Edition)
GB/T 30799 The test method of food detergents -- Determination of heavy metals
(2), As
Safety and Technical Standards for Cosmetics (2015 Edition)
GB/T 30797 The test method of food detergents -- Determination of total arsenic
3, Further explanation
(a), On physical and chemical indexes: firstly, shall be indicated carbon atom distribution; secondly, shall be indicated average molecular weight.
Major Uses
1, Typical applications
Use as chelating agent.
2, Water treatment
Use as corrosion inhibitor, antisludging agent.
Manufacturers
Update: 20140804(1); 20190701(2);