Chemical Category

• Type: Herbicide (weed killer)
• Chemical group: Chloroacetamide family
• Formula: C₁₇H₂₆ClNO₂

Mode of Action

• Pretilachlor inhibits cell division and growth in germinating weed seeds.
• It prevents shoot and root development, so weeds die before emerging from the soil.

Application

• Usually applied as:
• Pretilachlor 50% EC (Emulsifiable Concentrate)
• Mixed with water and sprayed on the soil surface after transplanting.
• Often used with safeners like Fenclorim to protect the rice crop.

Weeds Controlled

• Examples include:
• Echinochloa crus-galli (Barnyard grass)
• Cyperus difformis (Small flower umbrella sedge)
• Fimbristylis miliacea
• Monochoria vaginalis

Pretilachlor Technical — Overview

• Chemical Name: 2-Chloro-2′,6′-diethyl-N-(2-propoxyethyl)acetanilide
• CAS No.: 51218-49-6
• Technical Grade Purity: ≥ 95% (usually 95–98%)
• Form: Clear to pale yellow liquid
• Type: Selective pre-emergence herbicide (Chloroacetamide family)

Main Uses of Pretilachlor Technical

• Intermediate for producing Pretilachlor formulations, such as:
• Pretilachlor 50% EC
• Pretilachlor 37% EW
• Used as an active ingredient (AI) in the formulation industry for agricultural herbicides.
• Controls annual grasses, sedges, and broad-leaved weeds in paddy (rice) cultivation.

Storage & Stability

• Store in cool, dry, well-ventilated
• Keep away from direct sunlight and heat sources.
• Use HDPE or lined metal drums.
• Shelf life (technical grade): ~2 years if stored properly.