TETRASODIUM ETHYLENEDIAMINETETRAACETATE

PRODUCT IDENTIFICATION

CAS NO. 64-02-8

TETRASODIUM ETHYLENEDIAMINETETRAACETATE

EINECS  NO. 200-573-9
FORMULA CH4N2(CH2COONa)4
MOL WT. 380.17

H.S. CODE

 
SMILES

 

CLASSIFICATION

 

TOXICITY

 
SYNONYMS EDTA; Na4EDTA;
Ethylenediaminetetraacetic acid, tetrasodium salt; Tetrasodium Tetrasodium (ethylenedinitrilo)tetraacetate; Ethylenediaminetetraacetic tetrasodium salt; Sodium edetate; (Ethylenedinitrilo)tetraacetic acid tetrasodium salt;
SMILES

 

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE white powder
MELTING POINT > 300 C
BOILING POINT

Decomposes (> 400 C)

SPECIFIC GRAVITY

 

SOLUBILITY IN WATER Soluble
pH 10.5 - 12.5
VAPOR DENSITY

 

REFRACTIVE INDEX

 

NFPA RATINGS

Health: 1 ; Flammability: 0 ; Reactivity: 0

AUTOIGNITION

 

FLASH POINT

Not considered to be a fire hazard
STABILITY Stable under normal conditions

APPLICATIONS

Detergent; cosmetics; cleaning products; metal working; polymerization

SALES SPECIFICATION

APPEARANCE

white creamy powder

ASSAY (as Na4EDTA)

86.0% min ( 92 wt% as Na4EDTA1.5H2O)

BULK DENSITY

620-760 g/l

WATER SOLUBILITY

45.0 %

pH

10.5 - 12.5 (1 wt% solution)
TRANSPORTATION
PACKING
25kgs in  Bag
HAZARD CLASS Not regulated
UN NO.  
REMARKS (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.