C6H9NO6
191.14 g/mol
Industrial ChemicalWarning
NITRILOTRIACETIC ACID
CAS139-13-9EC205-355-7
Category
Industrial Chemical
Compound Class
Organic Acid
Primary Use
chelating agent for metals
Nitrilotriacetic acid (NTA) is an aminopolycarboxylic acid that appears as a colorless solid. Its conjugate base, nitrilotriacetate, is primarily used as a chelating agent for metal ions such as calcium, cobalt, copper, and iron.
chelating agent for metal ionswater treatmentindustrial cleaning
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
Restricted or banned substances
Substances on this list are banned or restricted under the named regulation. This page is a compliance reference — verify your obligations under applicable law.
Relevant lists:California Proposition 65
CAS 139-13-9
Related Compounds
SimilarStructure SimilarSimilarity 0.73
Edetic acid
CAS60-00-4
chelating agent for detergents and cleaners
ReferenceSame Category
4-Phenoxyaniline
CAS139-59-3
Chemical intermediate for dyes and pigments
ReferenceSame Category
4,4'-thiodianiline
CAS139-65-1
Dye intermediate
ReferenceSame Category
Diphenyl sulfide
CAS139-66-2
organosulfur compound intermediate
ReferenceSame Category
N-ethyldiethanolamine
CAS139-87-7
Solvent and detergent precursor
Safety Reference
Warning
H302Harmful if swallowed
H319Causes serious eye irritation
H351Suspected of causing cancer
H320Causes eye irritation
H373May cause damage to organs through prolonged or repeated exposure
H402Harmful to aquatic life
H411Toxic to aquatic life with long lasting effects
H315Causes skin irritation
H340May cause genetic defects
Regulatory Compliance1
- California Proposition 65USRegulation
Customs Tariff Classification
The international HS code for NITRILOTRIACETIC ACID (CAS 139-13-9) is 2922.49.
HS code (international, 6-digit)
2922.49
EU CN code (8-digit)
2922 49 85
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
2-[bis(carboxymethyl)amino]acetic acid
InChIKey
MGFYIUFZLHCRTH-UHFFFAOYSA-N
SMILES
C(C(=O)O)N(CC(=O)O)CC(=O)O
Synonyms (58)
- NTA
- Edetic Acid EP Impurity A
- Nitrilotriacetic acid, United States Pharmacopeia (USP)
- Sodium Calcium Edetate EP Impurity A
- 2,2',2''-nitrilotriacetic
- Acetic acid, nitrilotri-
- Acid, Nitrilotriacetic
- Aminotriacetic acid
- Aminotriethanoic acid
- CHEL 300
- DISODIUM EDETATE IMPURITY A
- Glycine,N-bis(carboxymethyl)-
- H3nta
- Hampshire NTA acid
- Komplexon I
- Kyselina nitrilotrioctova
- N,N-Bis(carboxymethyl)glycine
- N,N-Bis(carboxymethyl)glysine
- NITRILO-N,N,N-TRIACETIC ACID
- NITRILOTRIACETIC ACID
- NTA (Nitrilotriacetic acid)
- Nitrilo-2,2''-triacetic acid
- Nitriloacetate
- Nitrilotriacetate, Aluminum
- Nitrilotriacetate, Dysprosium
- Nitrilotriacetic acid (NTA)
- Nitrilotriacetic acid, p.a.
- NitrilotriessigsA currencyure
- Nitrilotriessigsaeure
- Titriplex I
- Tri(carboxymethyl)amine
- Triglycine; Triglycine; NTA
- Triglycollamic acid
- Trilon A
- Tris(carboxymethyl)amine
- Versene NTA acid