Tetrasodium edetate dihydrate

Tetrasodium edetate dihydrate (CAS 10378-23-1), commercially known as EDTA-4Na, is a fully neutralized sodium salt of EDTA in hydrated form.

Where is Tetrasodium edetate dihydrate used?

• Personal care and cosmetics: stabilizes formulations by deactivating trace metals that would otherwise degrade preservative systems
• Water treatment: sequesters hardness ions and controls scale formation in industrial circuits
• Textile and leather processing: prevents metal-catalyzed oxidation during bleaching and dyeing
• Food-compatible applications: sequestrant that maintains product stability and extends shelf life where metal contamination is a processing risk
• It functions as a chelating and sequestering agent, binding metal ions such as calcium and magnesium.

Good to know: By binding iron and copper, it prevents these metal ions from interfering with formulations, processes, or finished products.

Commercial specifications

• Packaging ranges from small bags to bulk quantities
• Concentration typically expressed on a dihydrate basis