Dacthal (dimethyl 2,3,5,6-tetrachloroterephthalate) is a specialty chemical widely used as a pre-emergent herbicide in agricultural and horticultural practices. It is primarily applied to control the growth of annual grasses and broadleaf weeds in crops such as broccoli, Brussels sprouts, cabbage, onions, and some fruits like strawberries. The chemical works by inhibiting weed seed germination and early seedling development, making it effective for maintaining crop yields and reducing competition for nutrients. It is also used in non-agricultural settings, such as lawns, ornamental gardens, and turf management, to maintain weed-free landscapes. Dacthal is typically applied to the soil surface, where it forms a barrier to prevent weed emergence. Its residual activity provides long-lasting control, reducing the need for frequent reapplication. However, proper application rates and timing are crucial to minimize environmental impact and ensure effectiveness.

This product is provided as an analytical standard with high purity (98-100%), suitable for laboratory use in pesticide residue analysis, quality control, research, and calibration of analytical instruments.