EDTA Tetrasodium
Overview
EDTA Tetrasodium is the tetrasodium salt of ethylenediaminetetraacetic acid (EDTA), a widely used chelating agent in various industries. It effectively binds metal ions, making it valuable in processes where metal ion control is crucial. As a water-soluble compound, it finds extensive use in applications ranging from industrial cleaning to food preservation. Its ability to sequester divalent and trivalent metal ions (such as Ca2+ and Mg2+) makes it particularly useful in water softening and detergent formulations.
Physical and Chemical Properties
EDTA Tetrasodium appears as a white, crystalline powder with excellent water solubility. It is stable under normal temperatures but decomposes when heated above 300°C. The compound forms stable complexes with most metal ions, with stability constants varying depending on the metal. Its chelating ability remains effective across a wide pH range, though optimal performance typically occurs in alkaline conditions. The compound is hygroscopic and should be protected from moisture during storage to prevent caking.
Main Applications
In water treatment, EDTA Tetrasodium prevents scale formation by binding calcium and magnesium ions. The detergent industry uses it to improve cleaning efficiency by inactivating water hardness ions that interfere with surfactants. The pharmaceutical industry employs it as a stabilizer in some medications and as an anticoagulant in blood collection tubes. In food processing, it serves as a preservative by chelating metal ions that catalyze oxidation reactions. Textile manufacturers utilize it in dyeing processes to improve color fastness.
Safety and Storage
While not highly toxic, EDTA Tetrasodium requires careful handling. Workers should use gloves and eye protection to prevent irritation. Inhalation of dust should be avoided by using proper ventilation or respiratory protection. Store in original, tightly sealed containers in a dry, cool area away from incompatible materials. The compound is stable for at least two years when stored properly. Spills should be cleaned up promptly with water and collected for proper disposal.
B2B Procurement Guide
When sourcing EDTA Tetrasodium, specify required purity levels - industrial grade (98-99%) for most applications versus higher purity for sensitive uses. Consider packaging options based on your usage rate; bulk shipments offer cost savings for large consumers. Evaluate suppliers based on consistent quality, reliable delivery, and proper documentation including certificates of analysis. Request samples for testing before large orders. For international shipments, verify compliance with destination country regulations regarding chemical imports.
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