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Item # Unit Size
5 g
25 g

For Research Use Only Products

ChemicalName: Diethylenetriamine-N,N,N',N'',N''-pentaacetic acid
CAS: 67-43-6

White crystalline powder
Purity: ≥99.0% (Titration)
MW: 393.35, C14H23N3O10

Storage Condition: ambient temperature
Shipping Condition: ambient temperature

Chemical Structure

Product Description
The stability constant of the DTPA-metal complex is the second highest, next only to the CyDTA-metal complex. DTPA is a free acid that has low solubility in water. DTPA is useful as a strong masking reagent. It is also used for the extraction of metal ions such as Al, Fe, Ma, Zn, Cu, Cd, and Ni from soil at pH 5.3.

Table of Stability Constants (PDF file)

1. R. Pribil, et al., Determination of Rare Earths in the Presence of Phosphate. Chem Anal. 1967;56:23-24.
2. J. Kinnunen, et al., Rapid Determination of the Rare Earths in Phosphate Rock. Chem Anal. 1967;56:24-25.
3. J. Kinnunen, et al., Determination of Rare Earths in Phosphate Rock by Atomic Absorption Flame Photometry. Chem Anal. 1967;56:25-27.
4. W. A. Norvell, Comparison of Chelating Agents as Extractants for Metals in Diverse Soil Materials. Soil Sci Soc Am J. 1984;48:1285-1292.