For professionals in the chemical and pharmaceutical industries, a thorough understanding of a chemical's properties is fundamental to its effective and safe application. Cyclopropanesulfonyl chloride, identified by CAS number 139631-62-2, is an important organic synthesis intermediate whose properties dictate its utility and handling requirements.

Physically, cyclopropanesulfonyl chloride is described as a yellow transparent liquid. This visual characteristic is one of the first identifiers for quality control. Its molecular formula is C3H5ClO2S, with a molecular weight of approximately 140.59 g/mol. Key physical properties relevant to its use include a boiling point of around 60°C and a density of 1.38 g/mL at 25°C. The refractive index is noted as 1.4770. These parameters are crucial for chemists when designing reaction conditions and purification methods. Furthermore, the compound's flash point is 204°F, indicating its flammability characteristics.

Chemically, the presence of the sulfonyl chloride group (-SO2Cl) makes cyclopropanesulfonyl chloride a reactive electrophile. This functional group readily undergoes nucleophilic substitution reactions, a property that is extensively exploited in organic synthesis. It is particularly useful for introducing the cyclopropanesulfonyl moiety into other molecules, forming new carbon-sulfur bonds. However, this reactivity also means it is sensitive to moisture, which can lead to hydrolysis and the formation of hydrochloric acid, necessitating careful storage in cool, dry conditions, typically between 2-8°C. As a reliable manufacturer and supplier, NINGBO INNO PHARMCHEM CO.,LTD. ensures that our cyclopropanesulfonyl chloride is handled and packaged to maintain its integrity. We offer this vital intermediate with a guaranteed purity of ≥98.0%. For those looking to purchase cyclopropanesulfonyl chloride for their synthesis needs, understanding these properties is key to successful application and safe handling. Request a quote from us to secure a high-quality supply.