Disodium EDTA (EDTA-2Na)

EDTA-2Na – Stable Chelating Agent

Disodium EDTA (EDTA-2Na) is a white crystalline powder, soluble in water but almost insoluble in alcohol. Its aqueous solution is weakly acidic. As a widely used chemical compound, EDTA-2Na possesses strong chelating ability, forming stable water-soluble complexes with various metal ions including calcium, magnesium, copper, iron, and lead. Its chemical structure contains multiple reactive carboxyl and amino groups, enabling it to effectively bind metal ions across a wide range of pH conditions. It is extensively used in daily chemical care, industrial water treatment, metal cleaning, and other fields.

Parameter	Spezifikation
Inhalt %	99.50% Min.
Chlorid (Cl-) %	0,01% Max.
Sulfat (SO₄²-) %	0,05% Max.
Schwermetalle (als Pb) %	0,001% Max.
Eisen (Fe) %	0,001% Max.
Chelatwert (mgCaCO₃/g)	267 Min.
pH (50g/L, 25℃)	4.0 – 5.0
NTA-Inhalt %	0,1% Max.
Erscheinungsbild	Weißes kristallines Pulver

Produktspezifikationen (Daily Chemical Grade)

A 50g/L EDTA-2Na solution has a pH of 4.0–5.0 (weakly acidic), making it especially suitable for neutral to weakly acidic formulations such as cosmetics, personal care products, and certain industrial cleaners.

Empfohlene Dosierungsrichtlinien

Anmerkung: Die tatsächliche Dosierung sollte durch Labortests auf der Grundlage von Wasserhärte, Schwermetallkonzentration und pH-Wert der Formulierung optimiert werden.

Anmeldung	Empfohlene Dosierung	Funktion
Waschmittel/Geschirrspülmittel	0,5% - 2,0% der Gesamtformulierung	Chelatbildner für hartes Wasser, verbesserte Waschkraft
Body Wash / Shampoo	0.1% – 0.5%	Chelates metal ions, stabilizes formulation
Cosmetics (Creams/Lotions)	0.05% – 0.2%	Prevents oxidation and discoloration, extends shelf life
Kessel / zirkulierendes Kühlwasser	5 – 50 ppm (continuous feed)	Kesselsteinhemmung, Enthärtung
Galvanik Abwässer	1:1 - 3:1 molares Verhältnis (je nach Schwermetallkonzentration)	Chelatbildung von Kupfer, Nickel, Blei usw.
Metal Cleaning / Polishing	1% – 5% solution	Removes rust and oxide scale

Why Choose EDTA-2Na?

Performs Excellently in Neutral/Weakly Acidic Systems

Unlike EDTA-4Na, EDTA-2Na achieves optimal chelation efficiency at pH 4.0–5.0 (weakly acidic), making it ideal for cosmetics, personal care products, neutral detergents, and certain industrial formulations.

High Chelation Value – Strong Metal Ion Binding Capacity

Each gram of EDTA-2Na chelates ≥267 mg CaCO₃ equivalent of hardness ions, which is higher than EDTA-4Na (220 mg). It effectively binds calcium, magnesium, iron, copper, and other metal ions.

Stabilizes Formulations & Extends Shelf Life

In liquid detergents, creams, lotions, and other products, EDTA-2Na chelates trace metal ions (such as Fe³⁺, Cu²⁺), effectively preventing catalytic oxidation, discoloration, odor development, and significantly extending product shelf life.

Verhindert Seifenschaum und Geräteverkalkung

In hard water conditions, EDTA-2Na preferentially binds with calcium and magnesium ions, preventing anionic surfactants from forming insoluble soap scum while protecting pipes, boilers, and heat exchangers from scale buildup.

EDTA-2Na vs. EDTA-4Na: Key Differences

Vergleich	EDTA-2Na (Dinatrium)	EDTA-4Na (Tetranatrium)
pH-Wert (1%-Lösung)	Weakly acidic / Near neutral (4.0–5.0)	Stark alkalisch (10,5-11,5)
Wasserlöslichkeit	Gut	Extremely high, faster dissolution
Optimale Chelationseffizienz	Neutrale/schwach saure Umgebungen	Alkalische Umgebungen
Geeignete Anwendungen	Cosmetics, personal care, food, pharmaceuticals, neutral detergents	Alkaline detergents, industrial alkaline cleaners, high hardness water, heavy metal wastewater
Chelatwert (mgCaCO₃/g)	267 Min.	220 Min.
Chelatbildung Merkmale	Mild and stable, suitable for standard neutral/weakly acidic systems	Stark, chelatiert schnell Ca/Mg und mehrere Schwermetalle

If your main product system is cosmetics, personal care products, neutral detergents, food additives, or pharmaceutical excipients, EDTA-2Na is the better choice.
For strongly alkaline formulations (e.g., laundry liquids, dishwashing detergents, alkaline industrial cleaners), EDTA-4Na is recommended.

Hauptanwendungsbereiche

EDTA-2Na is widely used as a stable chelating agent and water softener across daily chemical care, industrial water treatment, and metal processing industries.

Daily Chemicals (Most Common)

Tägliche chemische Produkte

Body wash, laundry liquid, dish soap, and other liquid detergents
Softens hard water, improves detergency and foamability
Prevents soap scum formation, chelates metal ions, stabilizes formulations

Cosmetics & Personal Care

Creams, lotions, soaps, shampoos
Chelates metal ions to prevent oxidative degradation of ingredients
Extends product shelf life and maintains texture stability

Industrial Water Treatment

Boiler & Circulating Water Treatment

Used as scale inhibitor and scale remover
Prevents new scale formation, can dissolve some existing scale
Inhibits equipment corrosion, extends system life

Abwasserbehandlung

Electroplating wastewater, printing & dyeing wastewater
Chelates heavy metals such as copper, nickel, lead, and zinc
Reduziert die Toxizität von Schwermetallen für die anschließende Fällung oder Rückgewinnung

Metal Cleaning & Polishing

Removes rust and oxide scale from metal surfaces
Improves metal surface finish

EDTA-2Na Packaging & Storage

Wir bieten flexible Verpackungslösungen an, die den unterschiedlichen Bedürfnissen unserer Kunden gerecht werden.

25kg Sack

Standard-Pulververpackung mit feuchtigkeitsdichter Funktion, um die Stabilität des Produkts während Transport und Lagerung zu gewährleisten.

Kundenspezifische Verpackung

TENESSY kann auch kundenspezifische Verpackungsdienstleistungen anbieten, einschließlich Jumbo-Beutel, Papiertüten oder OEM-Beutel mit Markenaufdruck.

Request Your Free EDTA-2Na Sample

Experience the stable chelation performance of high-purity EDTA-2Na in your neutral/weakly acidic system firsthand.

At Tenessy, experience our EDTA-2Na product firsthand with a FREE sample!
- Stichprobengröße: 25kg oder 50kg.
- Versand: Schnell über FedEx oder DHL.
- Dienst: Unterstützung bei der Anpassung der Formel durch Experten.

FAQ

Q1: Can EDTA-2Na and EDTA-4Na be used interchangeably?

Eine direkte Substitution wird nicht empfohlen. Ihre pH-Werte unterscheiden sich erheblich, was den pH-Wert der endgültigen Formulierung verändern und die Chelatbildungseffizienz und Systemstabilität beeinträchtigen würde. Wenn ein Austausch erforderlich ist, müssen der pH-Wert und die anderen Komponenten entsprechend neu formuliert werden.

Q2: What is the typical dosage of EDTA-2Na in cosmetics?

Typically 0.05% – 0.2% of the total formulation. This is sufficient to chelate trace metal ions from raw materials and prevent oxidative degradation. The specific dosage should be determined based on formulation components and stability testing.

Q3: Does EDTA-2Na contain phosphorus?

No. For regions with phosphate bans or environmentally sensitive detergent and water treatment formulations, EDTA-2Na can be used as a phosphorus-free chelating agent.