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EGTA

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C14H24N2O10 · 380.35 g/mol

IUPAC name: 2-[2-[2-[2-[bis(carboxymethyl)amino]ethoxy]ethoxy]ethyl-(carboxymethyl)amino]acetic acid

Also called egtazic acid, calcium chelator, EGTA

Reagents
Open in Athanor
The structure of EGTA
Drawn from its SMILES with RDKit
Harmful or irritantWarningCauses skin irritation

Names and identifiers

IUPAC name
2-[2-[2-[2-[bis(carboxymethyl)amino]ethoxy]ethoxy]ethyl-(carboxymethyl)amino]acetic acid
Synonyms
egtazic acid, calcium chelator, EGTA
+ 38 more

Egtazic acid, Gedta, Ethylenebis(oxyethylenenitrilo)tetraacetic acid, Ebonta, Acide egtazique, Acido egtazico, 6,9-Dioxa-3,12-diazatetradecanedioic acid, 3,12-bis(carboxymethyl)-, Acidum egtazicum, Ethylene Glycol Tetraacetic Acid, [Ethylenebis(oxyethylenenitrilo)]tetraacetic acid, DTXSID2045151, Ethylenedioxybis(ethyleneamino)tetraacetic acid, Ethylene glycol bis(2-aminoethyl ether)tetraacetic acid, (Ethylenebis(oxyethylenenitrilo))tetraacetic acid, NSC-615010, Ethylene glycol bis(aminoethyl ether)tetraacetate, 526U7A2651, Glycoletherdiamine-N,N,N',N'-tetraacetic Acid, DTXCID0025151, CHEBI:30740, EGATA, Magnesium EGTA, EGTA, Tetrasodium, Ethylenebis(oxyethylenenitrile)tetraacetic Acid, RefChem:136371, 200-651-2, Acid, Egtazic, Ethylene glycol bis(2-aminoethyl ether)-N,N,N',N'-tetraacetic acid, Acido egtazico [INN-Spanish], 3,12-bis(carboxymethyl)-6,9-dioxa-3,12-diazatetradecanedioic acid, 1,2-Bis[2-[bis(carboxymethyl)amino]ethoxy]ethane, Egtazic acid [USAN:INN], MFCD00004291, Acide egtazique [INN-French], Acidum egtazicum [INN-Latin], 2-[2-[2-[2-[bis(carboxymethyl)amino]ethoxy]ethoxy]ethyl-(carboxymethyl)amino]acetic acid, NSC 615010, Glycol-etherdiaminetetraacetic acid

Molecular formula
C14H24N2O10
Empirical formula
C7H12NO5
Molecular weight
380.35 g/mol
Exact mass
380.14309
CAS number
67-42-5
PubChem CID
6207
Canonical SMILES
C(COCCOCCN(CC(=O)O)CC(=O)O)N(CC(=O)O)CC(=O)O
Isomeric SMILES
C(COCCOCCN(CC(=O)O)CC(=O)O)N(CC(=O)O)CC(=O)O
InChI
InChI=1S/C14H24N2O10/c17-11(18)7-15(8-12(19)20)1-3-25-5-6-26-4-2-16(9-13(21)22)10-14(23)24/h1-10H2,(H,17,18)(H,19,20)(H,21,22)(H,23,24)
InChIKey
DEFVIWRASFVYLL-UHFFFAOYSA-N
Molfile

Names, InChI and the identifiers from PubChem, retrieved 2026-10-14.

Calculated

Heavy atoms
26
Rings
0
Aromatic rings
0
Fraction sp³ carbons (Fsp3)
0.71
H-bond donors
4
H-bond acceptors
8 computed here · PubChem 12
Rotatable bonds
17
TPSA (Ų)
174.1 computed here · PubChem 174
Formal charge
0
XLogP3
-6.2 PubChem
Complexity
397 PubChem
Stereocenters
None
Double-bond geometry
None specified
Point group
C1 of one 3D conformer with its hydrogens, by Athanor’s engine (as in the app)

Elemental analysis

  • C44.21%
  • H6.36%
  • N7.37%
  • O42.06%

Isotope pattern

100%380.14317%381.1463.3%382.148383.151

Each peak is a nominal mass with its abundance-weighted exact mass, as a percentage of the tallest, from IUPAC natural isotope abundances.

Computed from the structure with RDKit 2026.09 when this page was built, beside PubChem's own computed values from its record; where the two differ, both are shown.

Predicted

log P
-2.04 Crippen (Wildman and Crippen 1999)
log S (water solubility)
0.21 ESOL (Delaney 2004), log mol/L
Synthetic accessibility
2.43 SA score, 1 easy to 10 hard (Ertl and Schuffenhauer 2009)

Drug-likeness: Lipinski’s rule of five

  • Molecular weight ≤ 500: 380.35
  • log P ≤ 5 (Crippen): -2.04
  • H-bond donors ≤ 5: 4
  • H-bond acceptors ≤ 10: 8

Passes all four rules.

¹³C NMR shifts, predicted

Predictions, not measurements; each names its method. A measured log P, where a source reports one, is under Physical properties.

Safety

Warning

Most widely reported: 12 company reports to ECHA. Source [1].

  • Harmful or irritant
  • H315Causes skin irritation (16.7% of reports)

Precautionary statements: P264, P280, P302+P352, P321, P332+P317, P362+P364

View all classifications (2)
  • [1] European Chemicals Agency (ECHA)This chemical does not meet GHS hazard criteria for 83.3% (10 of 12) of all reports.
  • [1] European Chemicals Agency (ECHA) · 12 reports · WarningH315

Always read the supplier’s safety data sheet before working with it.

Spectra

Experimental spectra held by these sources; each link opens the source's own record.

Literature

Reading PubChem, OpenAlex and GSRS…

Bioactivity

Reading ChEMBL…

References

  1. [1]European Chemicals Agency (ECHA) · ECHA legal notice: reuse with acknowledgement · via PubChem · retrieved 2026-10-14
  2. [2]SpectraBase · Linked only · via PubChem · retrieved 2026-10-14
  3. [3]NIST Mass Spectrometry Data Center · Linked only · via PubChem · retrieved 2026-10-14
  4. ·Calculated values: computed by Athanor with RDKit 2026.09 from the structure.
  5. ·Literature on PubChem

Data last updated 2026-10-14.