Nitrilotriacetic acid

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Nitrilotriacetic acid
IUPAC name	2-(Bis(carboxymethyl)amino)acetic acid
Identifiers
CAS number	[139-13-9]
PubChem	8758
SMILES	C(C(=O)O)N(CC(=O)O)CC(=O)O
Properties
Molecular formula	C6H9NO6
Molar mass	191.14 g/mol
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Nitrilotriacetic acid (NTA), C₆H₉NO₆, is a chemical compound used as a chelating agent which forms coordination compounds with metal ions (chelates) such as Ca²⁺, Cu²⁺ or Fe³⁺. In 1999 about 20,000 tons of NTA were used in Europe.

The uses of NTA are similar to that of EDTA. However, in contrast to EDTA, NTA is easily biodegradable and is almost completely removed during wastewater treatment.

In biotechnology applications, NTA is combined with His-tags.

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