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Merck

72560

Nitrilotriacetic acid

ACS reagent grade, ≥99.0% (T), ≥99.0%, powder

Synonym(s):

N,N-Bis(carboxymethyl)glycine, NTA, Tris(carboxymethyl)amine

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₩158,645

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Estimated to ship onDecember 22, 2025Details

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About This Item

Linear Formula:
N(CH2COOH)3
CAS Number:
139-13-9
Molecular Weight:
191.14
NACRES:
NA.21
PubChem Substance ID:
57652425
UNSPSC Code:
12352100
EC Number:
205-355-7
MDL number:
MFCD00004287
Beilstein/REAXYS Number:
1710776

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Product Name

Nitrilotriacetic acid, ACS reagent, ≥99.0%

InChI key

MGFYIUFZLHCRTH-UHFFFAOYSA-N

InChI

1S/C6H9NO6/c8-4(9)1-7(2-5(10)11)3-6(12)13/h1-3H2,(H,8,9)(H,10,11)(H,12,13)

SMILES string

OC(=O)CN(CC(O)=O)CC(O)=O

grade

ACS reagent

assay

≥99.0% (T)
≥99.0%

form

powder

ign. residue

≤0.1% (as SO4)

loss

≤0.1% loss on drying

mp

245 °C (dec.) (lit.)

anion traces

chloride (Cl-): ≤100 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: ≤20 mg/kg
K: ≤50 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Na: ≤500 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg

functional group

amine
carboxylic acid

Quality Level

200

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Show Differences

1 of 4

This Item
N0253N0128N9877
Nitrilotriacetic acid ACS reagent, ≥99.0%

Sigma-Aldrich

72560

Nitrilotriacetic acid

Nitrilotriacetic acid trisodium salt Sigma Grade, ≥98%

Sigma-Aldrich

N0253

Nitrilotriacetic acid trisodium salt

Nitrilotriacetic acid disodium salt Sigma Grade, ≥99%

Sigma-Aldrich

N0128

Nitrilotriacetic acid disodium salt

Nitrilotriacetic acid Sigma Grade, ≥99%

Sigma-Aldrich

N9877

Nitrilotriacetic acid

grade

ACS reagent

grade

Sigma Grade

grade

Sigma Grade

grade

Sigma Grade

assay

≥99.0% (T)

assay

≥98%

assay

≥99%

assay

≥99%

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

form

powder

form

powder

form

powder

form

powder

cation traces

Ca: ≤10 mg/kg, Co: ≤5 mg/kg, Cu: ≤5 mg/kg, K: ≤50 mg/kg, Mn: ≤5 mg/kg, Ni: ≤5 mg/kg, Zn: ≤5 mg/kg, Cr: ≤5 mg/kg, Mg: ≤5 mg/kg, Pb: ≤5 mg/kg, Cd: ≤5 mg/kg, Na: ≤500 mg/kg, Fe: ≤20 mg/kg

cation traces

-

cation traces

-

cation traces

-

anion traces

chloride (Cl-): ≤100 mg/kg

anion traces

-

anion traces

-

anion traces

-

Application

An excellent chelating agent.

pictograms

Health hazardExclamation mark
GHS08,GHS07

signalword

Warning

Hazard Classifications

Acute Tox. 4 Oral - Carc. 2 - Eye Irrit. 2

Storage Class

11 - Combustible Solids

wgk

WGK 2

flash_point_f

212.0 °F - closed cup

flash_point_c

100 °C - closed cup

ppe

Eyeshields, Gloves, type P3 (EN 143) respirator cartridges

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Certificates of Analysis (COA)

Lot/Batch Number
WXBF4360V
WXBF3339V
BCCK3596
BCCK3441
BCCJ2159

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Eagleson M.
Concise Encyclopedia Chemistry, 253-253 (1994)
John I Njagi et al.
Journal of colloid and interface science, 421, 27-32 (2014-03-07)
We report for the first time that nitrilotriacetic acid (NTA) is an effective reductant for the preparation of stable dispersions of uniform gold nanoparticles. The method described is capable of generating stable sols with a metal concentration as high as
Syntheses and structures of bismuth (III) complexes with nitrilotriacetic acid, ethylenediaminetetraacetic acid, and diethylenetriaminepentaacetic acid.
Summers SP, et al.
Inorganic Chemistry, 33(1), 88-92 (1994)
Hui Xu et al.
Biosensors & bioelectronics, 41, 90-95 (2012-09-11)
A label-free and highly sensitive impedimetric aptasensor was developed based on electropolymerized film for the determination of thrombin. The first step is the electrogeneration of a poly(pyrrole-nitrilotriacetic acid) (poly(pyrrole-NTA)) film onto the surface of electrodes followed by complexation of Cu(2+)
Li Jiang et al.
The Journal of pathology, 228(3), 366-377 (2012-08-07)
Exposure to asbestos is a risk for malignant mesothelioma (MM) in humans. Among the commercially used types of asbestos (chrysotile, crocidolite, and amosite), the carcinogenicity of chrysotile is not fully appreciated. Here, we show that all three asbestos types similarly
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