Description

Benzenesulfonic Anhydride is a versatile and reactive chemical intermediate, primarily used as a powerful sulfonating and dehydrating agent. Its high reactivity makes it a valuable building block for synthesizing a wide range of specialty chemicals, including dyes, pharmaceuticals, and agrochemicals. This compound is essential for research and production facilities in the fine chemical, pharmaceutical, and polymer industries seeking to introduce sulfonyl groups or create complex molecular architectures.

Application

• Pharmaceutical Intermediate: Key reagent in the synthesis of active pharmaceutical ingredients (APIs), particularly for introducing sulfonamide functionalities.
• Dye and Pigment Manufacturing: Acts as a sulfonating agent in the production of sulfonated dyes and organic pigments.
• Polymer Chemistry: Used as a cross-linking agent or modifier in the synthesis of specialty polymers and resins.
• Agrochemical Synthesis: Intermediate in the production of certain herbicides, fungicides, and other crop protection agents.
• Organic Synthesis Reagent: Employed as a dehydrating agent or catalyst in various esterification and condensation reactions.
• Research & Development: A valuable tool in academic and industrial R&D labs for exploring new synthetic pathways.

Basic Information

Product Name	Benzenesulfonic Anhydride
CAS No.	512-35-6
Molecular Formula	C12H10O5S2
Molecular Weight	298.33 g/mol
Synonyms	Benzenesulfonic acid anhydride; Benzenesulphonic anhydride; Phenylsulfonic anhydride; Sulfobenzoic anhydride; Benzenesulfonyl anhydride; Dibenzenesulfonyl oxide; NSC 403107; Bis(benzenesulfonyl) oxide
EINECS	208-142-7

Quality Control

Our Benzenesulfonic Anhydride is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity. We employ advanced analytical techniques, including HPLC, GC, and NMR, to verify identity and quantify impurities. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and specific impurity limits is provided with each shipment to support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area. Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation by atmospheric moisture. Recommended storage temperature is 2-8°C for long-term stability.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	92 - 96 °C
Loss on Drying	≤ 1.0 %
Heavy Metals (as Pb)	≤ 20 ppm

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