Description

Pyrazosulfuron is a selective, systemic sulfonylurea herbicide known for its high efficacy at low application rates. It is valued for its excellent post-emergence control of a broad spectrum of annual and perennial weeds in key agricultural systems. This compound is essential for formulators and agricultural chemical producers seeking reliable, high-purity active ingredients for crop protection solutions.

Application

Pyrazosulfuron is primarily utilized in the agricultural sector for selective weed control. Its key applications include:

• Rice Paddy Herbicide: Post-emergence control of broadleaf weeds, sedges, and some grasses in transplanted and direct-seeded rice.
• Cereal Crop Protection: Used in formulations for wheat and barley to manage resistant weed populations.
• Industrial Herbicide Manufacturing: Serves as a critical active ingredient (AI) for producing commercial-grade herbicide formulations, including wettable powders (WP) and suspension concentrates (SC).
• Turf and Ornamental Management: Employed in specialized products for weed control in non-crop areas.
• Research & Development: Used as an analytical reference standard and in agrochemical R&D for developing new weed control strategies.

Basic Information

Product Name	Pyrazosulfuron
CAS No.	98389-04-9
Molecular Formula	C14H18N6O7S
Molecular Weight	414.39 g/mol
Synonyms	1-(4,6-Dimethoxypyrimidin-2-yl)-3-(1-methyl-4-(2-methyl-2H-tetrazol-5-yl)pyrazol-5-ylsulfonyl)urea; Pyrazosulfuron-ethyl (common name); Sirius; Millagro; NC-311; A-821256; Pyrazosulfuron ethyl ester
EINECS	Contact for details

Quality Control

Our Pyrazosulfuron is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and performance. Certificates of Analysis (COA) documenting key parameters such as assay, related substances, and physical properties are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Keep away from heat, sparks, and open flame. For long-term storage, consider conditions that minimize exposure to moisture.

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%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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