Description

Pyrosulfuryl Chloride is a highly reactive inorganic acid chloride with the molecular formula Cl2O5S2. This compound is a critical reagent and building block in advanced chemical synthesis, valued for its ability to introduce sulfuryl or chlorosulfonyl groups. It is primarily utilized by research institutions and industrial manufacturers in the pharmaceutical, agrochemical, and specialty chemical sectors for the development of novel compounds and materials.

Application

• Pharmaceutical Intermediate Synthesis: Key reagent in the production of sulfonamide drugs and other active pharmaceutical ingredients (APIs).
• Agrochemical Manufacturing: Used in the synthesis of herbicides, fungicides, and insecticides that require sulfur-containing functional groups.
• Polymer & Material Science: Acts as a sulfonating or chlorosulfonating agent in the modification of polymers and creation of specialty materials.
• Organic Synthesis Reagent: Employed in laboratories for various reactions including chlorosulfonylation and as a dehydrating agent.
• Dye & Pigment Production: Intermediate in the manufacture of certain sulfur-based dyes and colorants.
• Chemical Research & Development: Serves as a versatile tool for exploring new synthetic pathways in academic and industrial R&D.

Basic Information

Product Name	Pyrosulfuryl Chloride
CAS No.	7791-27-7
Molecular Formula	Cl2O5S2
Molecular Weight	214.98 g/mol
Synonyms	Disulfuryl Chloride; Sulfuryl Chloride, dimer; Pyrosulfuryl Chloride; Chlorosulfuric Anhydride; Disulfuric Acid Dichloride; Disulfuryl Dichloride; Cl2S2O5
EINECS	232-245-6

Quality Control

Our Pyrosulfuryl Chloride is manufactured under strict quality management protocols. Each batch undergoes comprehensive analytical testing to ensure it meets the high-purity standards required for sensitive synthetic applications. A detailed Certificate of Analysis (COA) documenting identity, purity, and impurity profiles is provided with every shipment to guarantee traceability and consistency for our global B2B clients.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases, amines, and alcohols. Due to its nature as a strong acid/organic solvent and highly volatile compound, it should be handled and stored with appropriate precautions to minimize exposure to moisture and heat.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (by Titration)	≥ 98.0 %
Density (at 20°C)	~1.83 g/cm³
Boiling Point	~150-155 °C (decomposes)

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