Overview
Dichlorodimethylsilane (DMDCS) is a critical organosilicon compound with the CAS number 6414-32-0. It is widely used in the chemical industry for silicone production and as an intermediate in organic synthesis. Due to its reactivity with water, it must be handled with care to avoid hazardous reactions. As a key building block in silicone chemistry, DMDCS plays a vital role in creating polymers, sealants, and waterproofing materials. Its industrial significance stems from its ability to form siloxane bonds, which are the backbone of many silicone-based products.
Physical and Chemical Properties
Dichlorodimethylsilane is a colorless to light yellow liquid with a pungent odor. It has a molecular weight of 129.06 g/mol and a density of 1.07 g/cm³ at 20°C. The compound boils at 70-72°C and melts at -76°C. DMDCS is highly reactive with water, undergoing hydrolysis to produce hydrochloric acid (HCl) and silanols. This reaction is exothermic and requires careful handling. The compound is soluble in many organic solvents but must be kept away from moisture to prevent decomposition.
Main Applications
Dichlorodimethylsilane is primarily used in the production of silicones, which are employed in a wide range of industries, including construction, automotive, and electronics. It serves as a precursor for polydimethylsiloxane (PDMS), a common silicone polymer. Additionally, DMDCS is used as a waterproofing agent for textiles, paper, and other materials. Its ability to form hydrophobic coatings makes it valuable in applications requiring moisture resistance. The compound also finds use in the synthesis of other organosilicon compounds and as a reagent in organic chemistry.
Safety and Storage
Dichlorodimethylsilane is a hazardous material that requires strict safety measures. It is corrosive, flammable, and reacts violently with water, releasing toxic HCl gas. Proper personal protective equipment (PPE), including gloves, goggles, and a lab coat, must be worn when handling this compound. Storage conditions should be cool, dry, and well-ventilated, away from moisture and incompatible materials such as strong oxidizers and bases. Containers must be tightly sealed and labeled appropriately to prevent accidental exposure or spills.
B2B Procurement Guide
When procuring Dichlorodimethylsilane, it is essential to verify the CAS number (6414-32-0) to ensure product authenticity. Suppliers should provide certificates of analysis (CoA) and material safety data sheets (MSDS). Buyers should consider factors such as purity, packaging (typically in sealed drums or cylinders), and transportation requirements. Due to its hazardous nature, shipping must comply with regulations for corrosive and flammable materials. Bulk purchases may offer cost advantages, but storage capacity and safety protocols must be evaluated.
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