Description

4-Bromo-3-Methoxyphenyl Paratosylate is a high-purity organic intermediate of significant importance in advanced chemical synthesis. This compound matters for its role as a versatile building block in the development of complex molecules, particularly within the pharmaceutical and agrochemical sectors. Industries requiring precise and reliable synthesis of active pharmaceutical ingredients (APIs) and specialty fine chemicals will find this product essential for their research and production processes.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of novel active pharmaceutical ingredients (APIs) and drug candidates.
• Agrochemical Synthesis: Used in the research and development of advanced herbicides, fungicides, and pesticides.
• Liquid Crystal & OLED Material Precursor: Serves as a critical intermediate in the production of specialty electronic and display chemicals.
• Organic Synthesis & Research: A versatile reagent for constructing complex aromatic ethers and sulfonate esters in academic and industrial R&D laboratories.
• Dye & Pigment Manufacturing: Employed in the synthesis of specialized colorants and functional dyes.
• Polymer Chemistry: Acts as a monomer or functionalization agent in the creation of specialty polymers with tailored properties.

Basic Information

Product Name	4-Bromo-3-Methoxyphenyl Paratosylate
CAS No.	137396-01-1
Molecular Formula	C15H15BrO5S
Molecular Weight	387.25 g/mol
Synonyms	4-Bromo-3-methoxyphenyl p-toluenesulfonate; p-Toluenesulfonic Acid 4-Bromo-3-methoxyphenyl Ester; 4-Bromo-3-methoxyphenyl Tosylate; 1-Bromo-2-methoxy-4-[(4-methylphenyl)sulfonyloxy]benzene; Paratoluenesulfonic Acid 4-Bromo-3-methoxyphenyl Ester; 4-Bromo-3-methoxy Phenyl Tosylate; 4-Bromo-3-methoxyphenyl 4-Methylbenzenesulfonate
EINECS	Contact for details

Quality Control

Our 4-Bromo-3-Methoxyphenyl Paratosylate is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes rigorous analytical testing, including HPLC, NMR, and GC-MS, to confirm identity and purity. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with every shipment to support your quality assurance and regulatory compliance needs.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 10 ppm

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