Description

4-Methoxy-1-Naphthalenesulfonyl Chloride (Saltdata: Free) is a high-purity, moisture-sensitive sulfonyl chloride derivative used as a key building block in advanced organic synthesis. Its primary value lies in its reactivity as a sulfonating agent, enabling the introduction of the naphthalenesulfonyl moiety into target molecules. This compound is essential for researchers and manufacturers in the pharmaceutical and agrochemical industries, particularly for developing active ingredients and fine chemical intermediates. The CAS number for this product is 56875-55-9.

Application

• Pharmaceutical Intermediate: A critical reagent in the synthesis of active pharmaceutical ingredients (APIs), especially for compounds requiring a sulfonamide functional group.
• Agrochemical Synthesis: Used in the development of novel herbicides, fungicides, and insecticides where the sulfonyl chloride group facilitates key coupling reactions.
• Dye and Pigment Manufacturing: Serves as a precursor for synthesizing sulfonated naphthalene-based dyes and colorants.
• Polymer Chemistry: Employed as a monomer or modifying agent to introduce sulfonyl groups into polymer chains, altering solubility and thermal properties.
• Bioconjugation and Probe Development: Useful in biochemical research for labeling proteins, peptides, and other biomolecules due to its reactivity with amines.
• Material Science Research: Applied in the creation of organic electronic materials and metal-organic frameworks (MOFs).

Basic Information

Product Name	4-Methoxy-1-Naphthalenesulfonyl Chloride (Saltdata: Free)
CAS No.	56875-55-9
Molecular Formula	C11H9ClO3S
Molecular Weight	256.70 g/mol
Synonyms	1-Naphthalenesulfonyl chloride, 4-methoxy-; 4-Methoxy-1-naphthalenesulfonyl chloride; 4-Methoxynaphthalene-1-sulfonyl chloride; 1-(Chlorosulfonyl)-4-methoxynaphthalene; 4-MONSC; p-Methoxynaphthalene-1-sulfonyl chloride; NSC 163082
EINECS	Contact for details

Quality Control

Our 4-Methoxy-1-Naphthalenesulfonyl Chloride is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing to ensure high chemical purity and consistency. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Due to its hygroscopic (moisture-sensitive) nature, store under an inert atmosphere (e.g., nitrogen or argon) in a cool, dry place. Recommended storage temperature is 2-8°C for long-term stability. Keep away from strong acids and organic solvents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Solubility	Soluble in common organic solvents (e.g., DCM, THF, DMF)

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