Overview
Sodium 2,4-Dichlorophenoxyacetate is the sodium salt formulation of the widely used herbicide 2,4-D, first developed in the 1940s. This water-soluble variant addresses formulation challenges of the acid form, enabling easier mixing and application in agricultural settings. The compound functions as a synthetic auxin herbicide, mimicking plant growth hormones to disrupt normal growth processes in susceptible broadleaf weeds. Its selective action makes it particularly valuable in cereal crops and turf management.
Physical and Chemical Properties
As a salt derivative, this compound exhibits significantly higher water solubility compared to 2,4-D acid (up to 500 g/L versus 0.9 g/L). The crystalline powder form facilitates handling and precise dosing in commercial formulations. Thermal stability is moderate, with decomposition beginning around 215°C. The sodium salt form is less volatile than ester formulations of 2,4-D, reducing drift potential during application. In solution, it dissociates completely into sodium cations and 2,4-D anions.
Main Applications
Primary use is in post-emergent weed control systems for wheat, corn, and other cereal crops where it selectively targets broadleaf weeds without harming grass crops. Formulators often combine it with other herbicides like dicamba for enhanced spectrum control. Non-agricultural applications include turf management on golf courses and rights-of-way vegetation control. Some specialty uses include aquatic weed management in certain formulations approved for such use.
Safety and Storage
While less corrosive than the acid form, proper PPE including gloves and eye protection should be worn when handling. Storage areas should be dry and protected from temperature extremes to prevent caking or degradation. Environmental precautions include preventing runoff into water systems where it may affect non-target plants. Shelf life is typically 2-3 years when stored properly in original sealed containers away from moisture.
B2B Procurement Guide
Industrial buyers should specify technical grade (95%+ purity) for formulation work. Key procurement considerations include batch consistency, solubility characteristics, and absence of insoluble impurities. Packaging options range from 25kg woven bags with inner liners to bulk totes for large-scale operations. Regulatory documentation including SDS and certificates of analysis should accompany all shipments. Lead times typically range 2-4 weeks for domestic suppliers.
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