ETHYLENEBIS(NITRILODIMETHYLENE) TETRAPHOSPHONIC ACID

PRODUCT IDENTIFICATION
CAS NO. 1429-50-1

ETHYLENEBIS(NITRILODIMETHYLENE) TETRAPHOSPHONIC ACID 
EINECS NO. 215-851-5
FORMULA C6H20N2O12P4
MOL WT. 436.13

H.S. CODE

 

TOXICITY

 
SYNONYMS Ethylenebis(nitrilodimethylene)tetraphosphonic acid;
[1,2-Ethanediylbis[nitrilobis-(methylene)]] tetrakis-phosphonic acid; N,N,N',N'-Ethylenediamine tetra(methylenephosphonic acid); Ethylenediamine-n,n,n',n'-tetrakis-(methylenephosphonic acid); EDTMP;
SMILES

 

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE

white solid

MELTING POINT

  
BOILING POINT  
SPECIFIC GRAVITY  

SOLUBILITY IN WATER

miscible
pH

< 2 (1.0% sol.)
VAPOR DENSITY  

AUTOIGNITION

 

NFPA RATINGS

 

REFRACTIVE INDEX

  
FLASH POINT

 
STABILITY Stable under ordinary conditions

APPLICATIONS
Phosphonates derived from phosphorous (phosphonic) acid are employed in the applications of scale Inhibition, sequestration, dispersion and corrosion inhibition in addition to the main applications of agricultural chemicals such as fertilizers, pesticides, and soil conditioners. Phosphonates offer a wide range of sequestrants to control metal ions in aqueous systems. By forming stable water soluble complexes with multivalent metal ions, phosphonates prevent undesired interaction by blocking normal reactivity of metal ions. This ability contributes to function as threshold industrial water treatment and metal treatment processes (antiscalants, corrosion inhibitors, chelants, sludge conditioners, pulp bleachings, deflocculants, dispersants, metal cleaners, electroplating and crystal growth modifiers). Phosphonates are also used in manufacturing detergents, cosmetics and personal care products for special functions such as low levels iron control, stain removal, bleach stabilization, peroxide stabilization and anti-encrustation. Phosphonates existing in various compounds as acids or salts are marketed in the form of concentrated solutions.
SALES SPECIFICATION

APPEARANCE

white solid
ASSAY

90.0% min

WATER

10.0% max

CHLORIDES

0.5% max
TRANSPORTATION
PACKING 50kgs in fiber drum
HAZARD CLASS 8 (Packing Group: III )
UN NO. 1760
OTHER INFORMATION
European Hazard Symbols: C, Risk Phrases: 10/35, Safety Phrases: 9/16/23/26/28A/33/36 
GENERAL DESCRIPTION OF CHELATING AGENT
Chelation is a chemical combination with a metal in complexes in which the metal is part of a ring. Organic ligand is called  chelator or chelating agent, the chelate is a metal complex. The larger number of ring closures to a metal atom is the more stable the compound. This phenomenon is called the chelate effect; it is generally attributed to an increase in the thermodynamic quantity called entropy that accompanies chelation. The stability of a chelate is also related to the number of atoms in the chelate ring. Monodentate ligands which have one coordinating atom like H2O or NH3 are easily broken apart by other chemical processes, whereas polydentate chelators, donating multiple binds to metal ion, provide more stable complexes. Chlorophyll, green plant pigment, is a chelate that consists of a central magnesium atom joined with four complex chelating agent (pyrrole ring). The molecular structure of the chlorophyll is similar to that of the heme bound to proteins to form hemoglobin, except that the latter contains iron(II) ion in the center of the porphyrin. Heme is an iron chelate. Chelation is applied in metal complex chemistry, organic and inorganic chemistry, biochemistry, and environment protection. It is used in chemotherapeutic treatments for metal poisoning. Chelating agents offers a wide range of sequestrants to control metal ions in aqueous systems. By forming stable water soluble complexes with multivalent metal ions,  chelating agents prevent undesired interaction by blocking normal reactivity of metal ions. EDTA, ethylenediaminetetraacetate (hexadentating), is a good example of common chelating agent which have nitrogen atoms and short chain carboxylic groups. The sodium salt of EDTA is used as an antidote for metal poisoning, an anticoagulant, and an ingredient in a variety of detergents.  Chelating agents are important in the field of soap, detergents, textile dyeing, water softening, metal finishing and plating, pulp and paper, enzyme deactivation, photo chemistry, and bacteriocides.