Sulfuryl chloride

Sulfuryl chloride (CAS 7791-25-5), also known as sulfuric oxychloride and abbreviated SO2Cl2, is a reactive inorganic chlorinating and sulfonating agent used across chemical synthesis and industrial processing. It delivers both chlorination and sulfonation in a single reagent, reducing the need for multiple process steps. In pharmaceutical manufacturing, it serves as a chlorinating agent in the synthesis of active pharmaceutical ingredients.

This reagent is particularly valued in intermediates where precise reactivity control is required. Pulp and paper producers use it as a bleaching agent to achieve target brightness levels in processed fiber. Textile and leather processors apply it for whitening treatments and surface modification of natural substrates. In water treatment, it functions as a biocidal agent contributing to disinfection and microbial control.

These applications are critical for maintaining hygiene in industrial water systems. Sulfuryl chloride is supplied as a fuming liquid, typically in cylinders, drums, or ISO tank containers depending on volume. It is available in technical grade, with purity levels commonly at 97% or higher for industrial applications. Pharmaceutical-grade material meeting stricter purity specifications is also available for regulated synthesis.