EDTA Disodium Salt

Key differences between EDTA-2Na (disodium salt) and EDTA-4Na (tetrasodium salt):

• Chemical FormEDTA-2Na is the disodium salt of ethylenediaminetetraacetic acid (containing two molecules of crystal water), EDTA-4Na is the tetrasodium salt (containing four molecules of crystal water).
• pHAqueous solution of EDTA-2Na is slightly acidic (pH 4.0-5.0), while EDTA-4Na solution is alkaline (pH 10.5-11.5).
• SolubilityThe solubility of EDTA-4Na in water is higher (about 50%), while EDTA-2Na solubility is about 40%.
• AppearanceBoth are white crystalline powder.
• Application selectionChoose the appropriate salt form based on the pH requirements of the formulation and the specific application. For acidic cosmetic and household formulations, EDTA-2Na is suitable; for alkaline industrial cleaning agents, EDTA-4Na is preferred.

The main difference between industrial and cosmetic/household grades lies in purity requirements and fields of application:

• Content requirementsIndustrial grade ≥99.00%, Cosmetic grade ≥99.50%, Cosmetic grade has higher purity.
• Chelation ValueIndustrial grade 256 min., Cosmetic grade 267 min. The cosmetic grade has stronger chelating capacity.
• NTA contentFor cosmetic and household use, NTA ≤0.1% is required; for industrial grade, this requirement does not apply.
• Area of applicationCosmetic grade is suitable for products that directly contact the body, such as cosmetics and personal care products; industrial grade is used in petroleum, textile, industrial cleaning, and other industries.

When stored in original sealed packaging in a cool, dry, well-ventilated place, the product shelf life is24 monthsStorage considerations:

• Avoid direct sunlight, store in a dry, well-ventilated place.
• Protect from moisture. After opening, use as soon as possible or reseal.
• Handle with care, avoid damaging the packaging.

Yes, we provide free samples for customer testing. For details on sample quantities and delivery terms, please contact our sales department. We offer industrial grade and household chemical grade samples; you can conduct testing and evaluation according to your actual needs.

Standard minimum order quantity is 1 ton. For special specifications or custom packaging requirements, please contact our sales department for details. We support production according to customer samples and special specification production.

This product is exported to Southeast Asia, the Middle East, Europe, South America, and other regions; export documents provided include:

• Commercial Invoice
• Packing List
• Certificate of Origin (CO/Form E/Form A)
• SDS/MSDS (Multilingual Versions)
• Certificate of Analysis (COA)
• Ocean/Air Waybill
• Other required certification documents

EDTA-2Na dissolution method:

• Dissolves in warm waterTo speed up dissolution, it is recommended to use warm water at 40-50°C.
• Add graduallyGradually add EDTA-2Na powder to water while stirring continuously.
• Avoid direct heatingDo not place the product directly into boiling water to avoid clumping.
• pH adjustmentTo adjust pH, add a small amount of sodium hydroxide solution.

Solubility of EDTA-2Na in water is approximately 40%; temperature must be considered when preparing concentrated solutions.