Chloromethylmethyldichlorosilane, bearing the CAS number 1558-33-4, is a pivotal organosilicon compound extensively used as a chemical intermediate. Its distinct chemical identity, characterized by its structure and inherent reactivity, underpins its significance in synthesizing advanced materials, including coupling agents and various specialty chemicals for diverse industrial applications.

The chemical name for Chloromethylmethyldichlorosilane is dichloro(chloromethyl)methylsilane. Its molecular formula is C2H5Cl3Si, and it has a molecular weight of approximately 163.51 g/mol. The structure features a silicon atom bonded to a methyl group (-CH3), a chloromethyl group (-CH2Cl), and two chlorine atoms. This arrangement of functional groups is critical to its reactivity. The silicon-chlorine bonds are highly susceptible to hydrolysis, and the chloromethyl group can undergo various substitution reactions, making it a versatile building block in organic synthesis.

Synonyms for Chloromethylmethyldichlorosilane include (Chloromethyl)methyldichlorosilane, Dichloro(chloromethyl)methylsilane, and Methyldichlorosilylmethyl chloride, among others. These variations in nomenclature are common in chemical literature and databases, but they all refer to the same compound with the CAS 1558-33-4 identifier. The precise IUPAC name is dichloro-(chloromethyl)-methylsilane.

The reactivity of Chloromethylmethyldichlorosilane is primarily driven by its Si-Cl bonds and the chloromethyl group. The Si-Cl bonds are readily hydrolyzed by moisture, typically forming silanol groups which can then condense to form siloxane linkages. This property is fundamental to its use in creating silicone polymers and as a precursor for silane coupling agents. The chloromethyl group offers a site for nucleophilic substitution reactions, allowing for the introduction of other functional groups into the molecule, which is essential for tailoring the properties of downstream products like alpha silane coupling agents.

As a widely recognized intermediate, particularly by chemical suppliers such as NINGBO INNO PHARMCHEM CO.,LTD., understanding the detailed chemical identity of Chloromethylmethyldichlorosilane is crucial for effective utilization. Its application in synthesizing agricultural and pharmaceutical chemicals, alongside its primary role in coupling agent production, is a testament to its versatile reactivity. The consistent quality and purity, often specified at 98% minimum, are key factors that buyers consider when assessing the price and reliability of this compound.

In essence, the chemical structure and reactivity of Chloromethylmethyldichlorosilane (CAS 1558-33-4) define its indispensable role in the chemical industry. Its ability to participate in hydrolysis, condensation, and substitution reactions makes it a powerful intermediate for creating advanced materials and fine chemicals. For professionals looking to buy this compound, engaging with knowledgeable manufacturers and understanding its chemical behavior is the first step towards successful application.