p-toluene sulfonyl chloride, also known as p-toluenesulfonyl chloride, with the CAS number 98 - 59 - 9. This product is a high - quality chemical with a good price. It appears as white to light yellow flake - like crystals with a pungent odor. The molecular formula of p - toluene sulfonyl chloride is C₇H₇ClO₂S, and its molecular weight is approximately 190.65 g/mol. It has a melting point in the range of 65 - 69 °C and a boiling point of about 145 - 150 °C at 13 mmHg. This product is insoluble in water but soluble in common organic solvents such as benzene, toluene, and ethanol.
p - toluene sulfonyl chloride is widely used in various chemical industries. In the pharmaceutical industry, it serves as an important intermediate for the synthesis of many drugs. It can be used to introduce the p - toluenesulfonyl group into drug molecules, which can modify the physical and chemical properties of drugs, such as improving solubility and stability. In the field of organic synthesis, it is a key reagent for the preparation of sulfonamides. Sulfonamides are important organic compounds that have a wide range of applications in the synthesis of dyes, pesticides, and surfactants. Additionally, it can be used in the preparation of polymers, where it can react with polymers to introduce functional groups, thereby improving the performance of polymers.
When using p - toluene sulfonyl chloride, it is necessary to follow strict safety procedures. First, make sure to wear appropriate personal protective equipment, including gloves, goggles, and a laboratory coat. Before use, check the integrity of the container to ensure that there is no leakage. When taking samples, use a clean and dry spatula or pipette to avoid contamination. In the reaction process, usually, it needs to be added slowly to the reaction system under stirring to ensure uniform mixing. The reaction conditions such as temperature and time should be strictly controlled according to the specific reaction requirements. After the reaction is completed, appropriate post - treatment operations should be carried out, such as extraction, washing, and drying, to obtain the desired product.
Case 1: In a pharmaceutical research project, researchers used p - toluene sulfonyl chloride to synthesize a new anti - cancer drug. They first dissolved p - toluene sulfonyl chloride in toluene and then added a specific amine compound under the action of a base. After a series of reactions and purification steps, they successfully obtained the target drug molecule. The introduction of the p - toluenesulfonyl group improved the solubility of the drug in the body, thereby enhancing its bioavailability.
Case 2: A chemical company used p - toluene sulfonyl chloride in the production of a new type of surfactant. They reacted p - toluene sulfonyl chloride with a long - chain alcohol. Through careful control of reaction conditions, they obtained a surfactant with excellent emulsifying and dispersing properties. This surfactant has been widely used in the paint and printing ink industries, significantly improving the quality of products.
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