Butyryl chloride, also known by its CAS number 141-75-3, is a colorless to light yellow liquid characterized by a strong, pungent odor. Its chemical formula is C4H7ClO, and it possesses a molecular weight of 106.551. Key physical properties include a boiling point of approximately 102.9°C and a melting point of -89°C, indicating it remains liquid under standard laboratory conditions. A critical characteristic is its reactivity with water; it decomposes vigorously upon contact with moisture, releasing corrosive hydrochloric acid. This property necessitates careful handling and storage in dry, well-ventilated areas, often under inert gas. Understanding these characteristics is vital for any application, especially in sensitive processes like n-butyryl chloride pharmaceutical synthesis or pesticide intermediate manufacturing.

The primary utility of Butyryl chloride lies in its role as a versatile intermediate in organic synthesis. It is widely employed in the production of agrochemicals, pharmaceuticals, and various fine chemicals. For instance, it is a key precursor in the synthesis of herbicides such as Sethoxydim and Cycloxydim, highlighting its significance as a pesticide intermediate. In the pharmaceutical sector, it contributes to the creation of active pharmaceutical ingredients and drug intermediates, supporting the development of essential medicines. Its application as an acylating agent in general organic synthesis enables the formation of esters, amides, and other functionalized compounds crucial for diverse industries. As a leading chemical intermediate supplier in China, we provide Butyryl chloride that adheres to strict quality controls, ensuring its suitability for these demanding applications. Safety is paramount when working with Butyryl chloride due to its corrosive and flammable nature; appropriate personal protective equipment and handling procedures must always be followed.