Description

On 579 CAS NO 141286-14-8 is a high-purity chemical intermediate designed for advanced synthesis and research applications. This compound is valued for its specific reactivity and role in constructing complex molecular architectures, ensuring consistent performance in critical processes. It is essential for pharmaceutical development, agrochemical research, and specialized material science, where precise chemical properties and reliable supply are paramount.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of active pharmaceutical ingredients (APIs) and novel drug candidates.
• Agrochemical Research: Used in the development and production of advanced pesticides, herbicides, and plant growth regulators.
• Material Science: Serves as a precursor or modifier in the creation of specialty polymers, coatings, and advanced functional materials.
• Organic Synthesis: A versatile reagent for constructing complex organic molecules in academic and industrial research laboratories.
• Chemical Reference Standard: Employed as a high-purity standard for analytical method development, validation, and quality control.

Basic Information

Product Name	On 579
CAS No.	141286-14-8
Molecular Formula	C18H19NO4S
Molecular Weight	345.41 g/mol
Synonyms	ON-579; 1-(4-Methoxyphenyl)-5-methyl-3-(phenylsulfonyl)-1H-pyrazole-4-carboxylic acid; 3-(Benzenesulfonyl)-1-(4-methoxyphenyl)-5-methyl-1H-pyrazole-4-carboxylic acid; 1-(4-Methoxyphenyl)-5-methyl-3-(phenylsulfonyl)-4-pyrazolecarboxylic acid; 1H-Pyrazole-4-carboxylic acid, 1-(4-methoxyphenyl)-5-methyl-3-(phenylsulfonyl)-; ON 579; ON579
EINECS	Contact for details

Quality Control

Our On 579 is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including HPLC for assay and related substances, to meet the stringent requirements of research and industrial applications. A Certificate of Analysis (COA) detailing all test results is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which may affect product stability and performance.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
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.