Description

Pyrimisulfan is a selective, systemic sulfonylurea herbicide belonging to the acetolactate synthase (ALS) inhibitor class. It is valued for its high efficacy at low application rates and its excellent crop safety profile in tolerant species. This compound is primarily used by agrochemical manufacturers and formulators for the pre- and post-emergence control of a broad spectrum of grass and broadleaf weeds in key crops.

Application

• Pre-emergence and post-emergence weed control in rice paddies.
• Selective herbicide for use in cereal crops such as wheat and barley.
• Key active ingredient in professional agrochemical formulations (e.g., suspension concentrates, water-dispersible granules).
• Control of resistant weed biotypes in integrated weed management programs.
• Used in research and development for novel herbicide mixtures and synergistic combinations.
• Intermediate in the synthesis of other specialty agrochemicals.

Basic Information

Product Name	Pyrimisulfan
CAS No.	221205-90-9
Molecular Formula	C₁₅H₁₈N₄O₅S
Molecular Weight	366.39 g/mol
Synonyms	Pyrimisulfan; 1-(4,6-Dimethoxypyrimidin-2-yl)-3-[2-(dimethylcarbamoyl)-5-(2,2,2-trifluoroethoxy)phenylsulfonyl]urea; KIH-5996; Pyriflu sulfan; Pyriflu-sulfan; Pyriflu sulfan herbicide
EINECS	Contact for details

Quality Control

Our Pyrimisulfan is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. All materials are tested against rigorous in-house specifications, which are aligned with global agrochemical standards. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Keep away from heat, sparks, and open flame. The product is light-sensitive and should be stored away from direct light exposure.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0% Any single impurity ≤ 0.5%
Loss on Drying	≤ 0.5%
Sulfated Ash	≤ 0.1%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.