Dibutyl 2,2'-thiobisacetate (CAS 4121-12-4): A Versatile Chemical Intermediate

Dibutyl 2,2'-thiobisacetate, identified by its CAS Registry Number 4121-12-4, is a significant chemical compound widely recognized for its utility as a pharmaceutical intermediate. This colorless liquid plays a crucial role in various synthetic processes within the chemical and pharmaceutical industries, underscoring its importance in developing new and existing drug compounds and other specialized chemicals. Its unique molecular structure, characterized by a sulfur atom bridging two ester groups, contributes to its specific reactivity and versatile applications.

The chemical profile of Dibutyl 2,2'-thiobisacetate reveals a molecular formula of C12H22O4S and a molecular weight of 262.37 g/mol. Physically, it presents as a clear, colorless liquid, making it easy to handle and incorporate into diverse chemical reactions. Typical specifications for this compound indicate a high purity, often exceeding 98% or even 99% as determined by Gas Chromatography (GC). Its density is approximately 1.1 g/cm³, and it has an estimated boiling point around 335°C, signifying its relatively low volatility at standard temperatures. These intrinsic properties are critical for its performance and stability in manufacturing environments.

Primarily, Dibutyl 2,2'-thiobisacetate finds its application as a key building block in the synthesis of pharmaceuticals. As an intermediate, it is not the final product itself but an essential component in the multi-step synthesis of complex organic molecules. Its reactivity allows for its transformation into various derivatives, which are then used in the production of active pharmaceutical ingredients (APIs). Beyond pharmaceuticals, its chemical versatility suggests potential uses in other fine chemical syntheses, contributing to the development of specialty chemicals, polymers, or even agricultural chemicals where similar ester or thioether functionalities are required. Its specific role can vary from being a reactant in esterification reactions to acting as a sulfur donor or a component in more intricate coupling reactions, making it indispensable for chemists seeking specific molecular architectures.

Ensuring the integrity and efficacy of Dibutyl 2,2'-thiobisacetate is paramount. Proper storage conditions are vital to maintain its high purity and extend its shelf life. It is recommended to store this chemical in a dry, cool place, shielded from direct sunlight. For prolonged storage, temperatures between 2-8°C are often advised to prevent degradation and maintain its chemical stability. Quality control measures, including rigorous purity assays and adherence to strict chemical specifications, are essential for manufacturers and users alike to guarantee consistent product performance and safety.

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