Tetrasodium EDTA (EDTA-4Na)

EDTA-4Na – High Performance Alkaline Chelating Agent

Tetrasodium EDTA (EDTA-4Na) is the fully neutralized tetrasodium salt of EDTA with sodium hydroxide. It appears as a white crystalline powder, is readily soluble in water, and its aqueous solution is strongly alkaline. As a highly efficient metal ion chelator, it forms stable, water-soluble complexes with calcium, magnesium, copper, iron, lead, and other metal ions. It is widely used in household and industrial detergents, industrial cleaning, and water treatment.

Efficiently chelates calcium, magnesium, and heavy metals
Prevents soap scum and equipment scaling
Enhances detergency and foamability
Stable and effective in alkaline systems
Removes toxic heavy metals in wastewater treatment

Параметр	Технические характеристики
Content (as C₁₀H₁₂N₂O₈Na₄·4H₂O) %	99.50% Min.
Chloride (Cl⁻) %	0.01% Max.
Sulfate (SO₄²⁻) %	0.05% Max.
Heavy Metals (as Pb) %	0.001% Max.
Iron (Fe) %	0.001% Max.
Chelation Value (mgCaCO₃/g)	220 Min.
pH (1% solution, 25℃)	10.5 – 11.5
NTA Content %	0.1% Max.
Внешний вид	Белый кристаллический порошок

Product Specifications (Daily Chemical Grade)

Key property: A 1% EDTA-4Na solution has a pH of 10.5–11.5 (strongly alkaline), making it especially suitable for alkaline detergents and cleaning systems.

Recommended Dosage Guidelines

Note: Actual dosage should be optimized through laboratory testing based on water hardness, heavy metal concentration, and formulation pH.

Приложение	Рекомендуемая дозировка	Функция
Laundry Liquid / Dish Soap	0.5% – 2.0% of total formulation	Hard water chelation, improved detergency
Industrial Alkaline Cleaner	1% – 5%	Water softening, soap scum prevention
Boiler / Circulating Cooling Water	10 – 100 ppm (continuous feed)	Scale inhibition, softening
Electroplating Wastewater	1:1 – 3:1 molar ratio (based on heavy metal concentration)	Chelation of copper, nickel, lead, etc.
Printing & Dyeing Wastewater	0.1 – 0.5 g/L	Chelate metal ions, prevent dye precipitation

Request Your Free EDTA-4Na Sample

Experience the chelation performance of high-purity EDTA-4Na in your alkaline system firsthand.

At Tenessy, experience our EDTA-4Na product firsthand with a FREE sample!
- Размер выборки: 25kg or 50kg.
- Доставка: Быстрое отправление через FedEx или DHL.
- Обслуживание: Экспертная поддержка по корректировке формулы.

Why Choose EDTA-4Na?

Performs Excellently in Strongly Alkaline Systems

Unlike EDTA-2Na, EDTA-4Na achieves maximum chelation efficiency at pH 10.5–11.5, making it ideal for laundry liquids, dishwashing detergents, and alkaline cleaners.

Extremely High Water Solubility & Dissolution Rate

EDTA-4Na has much higher water solubility than EDTA-2Na and dissolves quickly at room temperature, facilitating production batching and on-site use.

Highly Effective Chelation of Calcium, Magnesium & Heavy Metals

Each gram of EDTA-4Na chelates ≥220 mg CaCO₃ equivalent of hardness ions while effectively binding copper, iron, lead, and other heavy metals to prevent metal-catalyzed oxidation.

Prevents Soap Scum & Equipment Scaling

In hard water conditions, EDTA-4Na preferentially binds with calcium and magnesium, preventing anionic surfactants from forming insoluble soap scum while protecting pipes, boilers, and heat exchangers from scale buildup.

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

Comparison	EDTA-4Na (Tetrasodium)	EDTA-2Na (Disodium)
pH (раствор 1%)	Strongly alkaline (10.5–11.5)	Weakly acidic / Near neutral (5–6)
Water Solubility	Extremely high, fast dissolution	Good, slightly lower than EDTA-4Na
Optimal Chelation Efficiency	Alkaline environments	Neutral / weakly acidic environments
Suitable Applications	Alkaline formulations, high hardness water, high heavy metal content	Neutral / weakly acidic formulations (daily chemicals, food, pharmaceuticals)
Chelation Characteristics	Strong, rapidly chelates Ca/Mg and multiple heavy metals	Mild and stable, suitable for standard formulations

Main Application Areas

EDTA-4Na is widely used as a high-performance chelating agent and water softener across daily chemicals, industrial cleaning, and water treatment industries.

Daily Chemicals (Alkaline Detergents)

Laundry Liquid, Dish Soap, Industrial Cleaners

Acts as a detergent builder and water softener, chelating calcium and magnesium ions in hard water
Improves detergency and foamability
Prevents soap scum formation and avoids oxidation of active ingredients

Alkaline Personal Care Products

Used as a stabilizer in some alkaline facial cleansers and body washes
Chelates metal ions to extend product shelf life

Industrial Cleaning & Water Treatment

Hard Water Softening & Scale Inhibition

Effective water softener for boilers, circulating cooling water, and heat exchangers
Chelates calcium and magnesium ions to prevent new scale formation
Can dissolve some existing scale and inhibit corrosion

Wastewater Treatment

Electroplating wastewater, printing & dyeing wastewater, mining wastewater
Chelates heavy metals such as copper (Cu²⁺), nickel (Ni²⁺), lead (Pb²⁺), and zinc (Zn²⁺)
Reduces heavy metal toxicity for subsequent precipitation or recovery

EDTA-4Na Packaging & Storage

We offer flexible packaging solutions to meet the diverse needs of our clients.

Мешок 25 кг

Standard powder packaging with moisture-proof function to ensure the stability of the product during transportation and storage.

Подгонянная упаковка

TENESSY также может предоставить услуги по индивидуальной упаковке, включая пакеты jumbo, бумажные пакеты или фирменные пакеты OEM.

ЧАСТО ЗАДАВАЕМЫЕ ВОПРОСЫ

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

Direct substitution is not recommended. Their pH values differ significantly, which would alter the final formulation pH and affect chelation efficiency and system stability. If replacement is necessary, reformulate the pH and other components accordingly.

Q2: Does EDTA-4Na contain phosphorus?

No. For regions with phosphate bans or environmentally sensitive detergent formulations, EDTA-4Na can be used as a phosphorus-free chelating agent.

Q3: Is EDTA-4Na degraded in wastewater?

EDTA compounds biodegrade slowly in natural environments. Some wastewater treatment plants effectively remove them using advanced oxidation processes (e.g., ozone, UV/H₂O₂). Compliance with local environmental discharge regulations is recommended.