Benzenesulfonic acid, 2-chloro-5-nitro-(CAS: 96-73-1)

2-Chloro-5-nitrobenzenesulfonic acid is a crystalline solid with a molecular weight of approximately 277.03 g/mol. It has a melting point of about 230-233°C. The compound is slightly soluble in water but more soluble in organic solvents like ethanol and acetone. It is chemically reactive, particularly towards nucleophiles and reducing agents.

2-Chloro-5-nitrobenzenesulfonic acid is usually synthesized from 5-nitrotoluene by chlorosulfonation. This process involves the reaction of 5-nitrotoluene with chlorosulfonic acid in the presence of a catalyst such as sulfuric acid. The reaction is exothermic and requires careful control of temperature to achieve high yield and selectivity.

2-Chloro-5-nitrobenzenesulfonic acid is used in the pharmaceutical industry for the synthesis of certain drugs. It is also utilized in the production of dyes and pigments, as well as in the manufacturing of sensors and semiconductors. Its applications in polymer science include the modification of polymer properties.

Proper personal protective equipment (PPE) such as gloves, goggles, and lab coat should be worn when handling 2-Chloro-5-nitrobenzenesulfonic acid (CAS: 96-73-1). This compound should be handled in a well-ventilated area or a fume hood due to its potential for releasing harmful fumes. Spills should be cleaned up immediately with appropriate absorbents, and the area should be thoroughly rinsed. Always refer to the Safety Data Sheet (SDS) for detailed handling and disposal instructions.