次氮基三乙酸

Description

Nitrilotriacetic acid · CAS 139-13-9 · C6H9NO6. UNII KA90006V9D. Melting Point: 242 °C dec; Solubility: In water, 5.91X10+4 mg/L at 25 °C; Vapor Pressure: 0.00000001 [mmHg].

Identification

CAS Registry Number	139-13-9
PubChem CID	8758
Molecular formula	C6H9NO6
IUPAC name	2-[bis(carboxymethyl)amino]acetic acid
UNII (FDA)	KA90006V9D

Computed Descriptors

Molecular Weight	191.14
XLogP3	-3.2
Hydrogen Bond Donor Count	3
Hydrogen Bond Acceptor Count	7
Rotatable Bond Count	6
Exact Mass	191.04298701
Monoisotopic Mass	191.04298701
Topological Polar Surface Area	115
Heavy Atom Count	13
Formal Charge	0

Physical & Chemical Properties

Melting Point	242 °C dec
Solubility	In water, 5.91X10+4 mg/L at 25 °C
Vapor Pressure	0.00000001 [mmHg]
LogP	-3.8
Decomposition	242 °C
Dissociation Constants	pK1 = 3.03, pK2 = 3.07, pK3 = 10.70 at 20 °C

Physical description & handling notes

• Nitrilotriacetic acid is an odorless white solid. Sinks in and mixes with water. (USCG, 1999)
• White odorless solid; [CAMEO] Off-white odorless powder; [MSDSonline]
• WHITE CRYSTALLINE POWDER.
• Prismatic crystals from hot water
• White crystalline powder
• Solid decomposes (NTP, 1992)

Regulatory Status

GHS notification summary	11.6% (58 / 500)

GHS Hazard Classification

GHS notification summary	11.6% (58 / 500)
Reported hazard statements	H302 (22.4%), H319 (83%), H351 (67%), H320, H373, H402, H411, H315

Documented Uses

• Used as a sequestering agent, eluting agent (purification of rare-earth elements), boiler feed-water additive, and chelating agent (cleaning and separation of metals); Also used in textile processing, soaps, rubber, emulsion polymerization, water treatment, and pulp and paper processing; [HSDB]
• Pulp and Paper Processing [Category: Industry]
• Textiles (Fiber & Fabric Manufacturing) [Category: Industry]
• Sewer and Wastewater Treatment [Category: Industry]
• Metal Extraction and Refining [Category: Industry]
• Builder in synthetic detergents

Synonyms

NITRILOTRIACETIC ACID; 139-13-9; Triglycollamic acid; N,N-Bis(carboxymethyl)glycine; Aminotriacetic acid; 2-[bis(carboxymethyl)amino]acetic acid; Trilon A; Versene NTA acid; Hampshire NTA acid; Komplexon I; Titriplex I; Nitriloacetate; Nitrilotriessigsaeure; Glycine, N,N-bis(carboxymethyl)-; Tri(carboxymethyl)amine; Acetic acid, nitrilotri-

Frequently Asked Questions

What are the CAS number and molecular formula of Nitrilotriacetic acid?

CAS 139-13-9; molecular formula C6H9NO6; molecular weight — g/mol.

What other names is Nitrilotriacetic acid known by?

NITRILOTRIACETIC ACID, 139-13-9, Triglycollamic acid, N,N-Bis(carboxymethyl)glycine, Aminotriacetic acid, 2-[bis(carboxymethyl)amino]acetic acid.

Is Nitrilotriacetic acid classified as hazardous?

11.6% of GHS notifications report no hazard classification (58 of 500).

What are the key physical properties of Nitrilotriacetic acid?

Melting Point: 242 °C dec; Solubility: In water, 5.91X10+4 mg/L at 25 °C; Vapor Pressure: 0.00000001 [mmHg]; LogP: -3.8.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.