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.

المعلمة	المواصفات
المحتوى %	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)	267 Min.
pH (50g/L, 25℃)	4.0 – 5.0
NTA Content %	0.1% Max.
المظهر	مسحوق بلوري أبيض

Product Specifications (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.

Recommended Dosage Guidelines

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

التطبيق	الجرعة الموصى بها	الوظيفة
Laundry Liquid / Dish Soap	0.5% – 2.0% of total formulation	Hard water chelation, improved detergency
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
Boiler / Circulating Cooling Water	5 – 50 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.
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.

Prevents Soap Scum & Equipment Scaling

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

Comparison	EDTA-2Na (Disodium)	EDTA-4Na (Tetrasodium)
الأس الهيدروجيني (محلول 1%)	Weakly acidic / Near neutral (4.0–5.0)	Strongly alkaline (10.5–11.5)
Water Solubility	جيد	Extremely high, faster dissolution
Optimal Chelation Efficiency	Neutral / weakly acidic environments	Alkaline environments
Suitable Applications	Cosmetics, personal care, food, pharmaceuticals, neutral detergents	Alkaline detergents, industrial alkaline cleaners, high hardness water, heavy metal wastewater
Chelation Value (mgCaCO₃/g)	267 Min.	220 Min.
Chelation Characteristics	Mild and stable, suitable for standard neutral/weakly acidic systems	Strong, rapidly chelates Ca/Mg and multiple heavy metals

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.

Main Application Areas

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)

المنتجات الكيميائية اليومية

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

Wastewater Treatment

Electroplating wastewater, printing & dyeing wastewater
Chelates heavy metals such as copper, nickel, lead, and zinc
Reduces heavy metal toxicity for subsequent precipitation or recovery

Metal Cleaning & Polishing

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

EDTA-2Na Packaging & Storage

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

كيس 25 كجم

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

التعبئة والتغليف حسب الطلب

يمكن أن توفر TENESSY أيضًا خدمات تغليف حسب الطلب، بما في ذلك الأكياس الضخمة أو الأكياس الورقية أو أكياس تصنيع المعدات الأصلية ذات العلامات التجارية.

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!
- حجم العينة: 25kg or 50kg.
- الشحن: سريع عبر فيديكس أو دي إتش إل.
- الخدمة: دعم تعديل الصيغة الخبيرة في تعديل الصيغة.

الأسئلة الشائعة

Q1: Can EDTA-2Na and EDTA-4Na 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: 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.