Description

Chlorosulfuric Acid, Phenyl Ester is a specialized organosulfur compound primarily used as a key sulfonating and sulfating agent in organic synthesis. Its high reactivity makes it a critical intermediate for introducing the phenylsulfonyl moiety into target molecules, enabling the production of various fine chemicals and functional materials. This product is essential for manufacturers and R&D laboratories in the pharmaceutical, agrochemical, and specialty polymer industries seeking to develop sulfonated derivatives with specific properties.

Application

• Pharmaceutical Intermediate: Synthesis of active pharmaceutical ingredients (APIs) and drug candidates containing sulfonamide or sulfonate ester functional groups.
• Agrochemical Synthesis: Production of herbicides, fungicides, and insecticides where the phenylsulfonyl group contributes to biological activity.
• Polymer Modification: Sulfonation agent for modifying polymers and resins to alter solubility, adhesion, or ionic characteristics.
• Dye and Pigment Manufacturing: Key intermediate in the synthesis of sulfonated dyes and organic pigments.
• Research & Development: Versatile reagent in organic chemistry labs for constructing complex molecular architectures.
• Surfactant Precursor: Used in the manufacture of specialized anionic surfactants and detergents.

Basic Information

Product Name	Chlorosulfuric Acid, Phenyl Ester
CAS No.	16475-29-9
Molecular Formula	C6H5ClO3S
Molecular Weight	192.62 g/mol
Synonyms	Phenyl Chlorosulfate; Benzenesulfonyl Chloride, O-analogue; Phenylsulfuryl Chloride; Chlorosulfonic Acid Phenyl Ester; Phenyl Chlorosulfonate; Sulfurochloridic Acid, Phenyl Ester; PSO2Cl; NSC 403124
EINECS	240-522-8

Quality Control

Our Chlorosulfuric Acid, Phenyl Ester is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including assay by titration and purity verification by GC/HPLC, to ensure it meets exacting standards for consistency and reactivity. Certificates of Analysis (COA) documenting all critical parameters are provided with every shipment to guarantee traceability and support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic and highly volatile nature, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) to prevent moisture absorption and decomposition. Keep away from heat, sparks, open flames, and incompatible materials such as strong bases, amines, and alcohols.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC/Titration)	≥ 98.0%
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Density (at 20°C)	~1.48 g/cm³

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