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03660 Sigma-Aldrich

Ethylenediaminetetraacetic acid dipotassium salt dihydrate

puriss. p.a., ≥99.0% (KT)

Synonym: (Ethylenedinitrilo)tetraacetic acid dipotassium salt, Dipotassium ethylenediaminetetraacetate dihydrate, EDTA dipotassium salt, Edathamil, Potassium ethylenediaminetetraacetate dibasic

  • CAS Number 25102-12-9

  • Linear Formula HOOCCH2(KOOCCH2)NCH2CH2N(CH2COOK)CH2COOH · 2H2O

  • Molecular Weight 404.45

  •  EC Number 217-895-0

  •  NACRES NA.21

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Properties

Related Categories Analytical Reagents, Analytical Reagents for General Use, Analytical/Chromatography, Biochemicals and Reagents, Chelators,
Quality Level   100
grade   puriss. p.a.
assay   ≥99.0% (KT)
pH   4-5 (25 °C, 50 mg/mL in H2O)
mp   255-280 °C (dec.) (lit.)
anion traces   chloride (Cl-): ≤50 mg/kg
  sulfate (SO42-): ≤200 mg/kg
cation traces   Ca: ≤10 mg/kg
  Cd: ≤5 mg/kg
  Co: ≤5 mg/kg
  Cr: ≤5 mg/kg
  Cu: ≤5 mg/kg
  Fe: ≤5 mg/kg
  Mg: ≤5 mg/kg
  Mn: ≤5 mg/kg
  Na: ≤1000 mg/kg
  Ni: ≤5 mg/kg
  Pb: ≤5 mg/kg
  Zn: ≤5 mg/kg
SMILES string   O.O.O.O.[K+].[K+].[K+].[K+].OC(=O)CN(CCN(CC([O-])=O)CC([O-])=O)CC(O)=O.OC(=O)CN(CCN(CC(O)=O)CC([O-])=O)CC([O-])=O
InChI   1S/C10H16N2O8.2K.2H2O/c13-7(14)3-11(4-8(15)16)1-2-12(5-9(17)18)6-10(19)20;;;;/h1-6H2,(H,13,14)(H,15,16)(H,17,18)(H,19,20);;;2*1H2/q;2*+1;;/p-2
InChI key   JFROQFOCFOKDKU-UHFFFAOYSA-L

Description

Application

Ethylenediaminetetraacetic acid dipotassium salt dihydrate (K2EDTA) can be used as:
•  A mobile phase modifier in the separation of UV filters using HPLC.
•  A chelating agent in the determination of traces of beryllium compound by colorimetric method.

Used to eliminate inhibition of enzyme catalyzed reactions due to traces of heavy metals

Safety & Documentation

Safety Information

Symbol 
Signal word 
Warning
Hazard statements 
Precautionary statements 
Target organs 
Respiratory Tract
Personal Protective Equipment 
RIDADR 
NONH for all modes of transport
WGK Germany 
WGK 2
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable

Documents

Certificate of Analysis (COA)

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Protocols & Articles
Peer-Reviewed Papers
15

References

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