Description

Amiprophos CAS NO 33857-23-7 is a selective organophosphorus herbicide known for its effective pre-emergence and early post-emergence control of annual grasses and broadleaf weeds. Its value lies in providing reliable crop safety and high efficacy at low application rates, making it a cost-effective solution for modern agriculture. This product is essential for agricultural professionals and formulators seeking to develop robust weed management programs for crops such as rice, cotton, and vegetables.

Application

• Selective Herbicide in Rice Paddies: Primarily used for pre-emergence control of barnyardgrass and other problematic weeds in transplanted and direct-seeded rice.
• Cotton Field Weed Management: Applied pre-emergence to protect cotton seedlings from competition with annual grasses and certain broadleaf weeds.
• Vegetable Crop Protection: Used in the cultivation of various vegetable crops to ensure clean fields and promote healthy growth.
• Turf and Ornamental Management: Employed in professional turf management and ornamental horticulture for selective weed control.
• Agrochemical Formulation: Serves as a key active ingredient for manufacturers developing proprietary herbicide blends and formulations.
• Soil-Applied Herbicide Programs: Integral to integrated weed management strategies relying on soil residual activity.

Basic Information

Product Name	Amiprophos
CAS No.	33857-23-7
Molecular Formula	C13H19N2O4PS
Molecular Weight	330.34 g/mol
Synonyms	Amiprofos; Amiprophos-methyl (common trade form); NTN 3389; ANP; O-(4-Methyl-6-nitrophenyl) O-ethyl N-isopropylphosphoramidothioate; 4-Methyl-2-nitro-1-((isopropylamino)(ethoxy)phosphinothioyloxy)benzene; Phosphoramidothioic acid, (1-methylethyl)-, O-(4-methyl-6-nitrophenyl) O-ethyl ester
EINECS	251-701-3

Quality Control

Our Amiprophos is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. The product undergoes comprehensive analytical testing, including assay by HPLC and verification of key impurity profiles, to meet technical-grade agricultural standards. A Certificate of Analysis (COA) detailing purity, moisture content, and related substances is provided with each shipment to guarantee specification compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Off-white to tan crystalline solid
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Moisture (Karl Fischer)	≤ 1.0%
Related Substances (HPLC)	Total impurities ≤ 3.0%
Melting Point	50 - 54 °C

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