Overview
Silicon dichloride (SiCl2) is a reactive inorganic compound that exists as a short-lived species in chemical reactions or under controlled conditions. Though not typically isolated commercially due to its instability, it plays a critical role as an intermediate in semiconductor manufacturing and specialty chemical synthesis. In industrial contexts, silicon dichloride is often generated in situ for immediate use rather than stored. Its high reactivity makes it valuable for depositing silicon-containing thin films in electronics and for creating silicon-based polymers with precise molecular structures.
Physical and Chemical Properties
As a low-boiling point compound, silicon dichloride transitions between gaseous and liquid states near room temperature depending on pressure conditions. Its molecular structure features a silicon atom covalently bonded to two chlorine atoms, with two vacant orbitals that drive its characteristic reactivity. The compound undergoes rapid disproportionation above -30°C, converting to silicon tetrachloride (SiCl4) and elemental silicon. This instability necessitates careful handling under strictly controlled atmospheres. Its reaction with water is particularly violent, producing hydrochloric acid and silicon oxides with significant heat release.
Main Applications
In semiconductor fabrication, silicon dichloride serves as a precursor for silicon epitaxial growth, where it decomposes to deposit ultra-pure silicon layers on wafer substrates. This application demands high-purity grades (99.999%+) to prevent doping contamination. The chemical industry utilizes SiCl2 intermediates in producing specialty silicones and silane coupling agents. These materials find use in adhesives, coatings, and composite materials where precise silicon-carbon bonds are required. Research laboratories employ controlled SiCl2 generation for studying reaction mechanisms in organosilicon chemistry.
Safety and Storage
Silicon dichloride requires specialized handling due to its corrosive nature and moisture sensitivity. All equipment must be thoroughly dried and purged with inert gas before use. Storage vessels should be made of corrosion-resistant materials like PTFE-lined stainless steel or quartz. Personal protective equipment (PPE) must include acid-resistant gloves, face shields, and fume hoods. Emergency protocols should account for potential HCl gas release. First aid measures require immediate flushing of exposed skin/eyes with copious water followed by medical evaluation for acid burns.
B2B Procurement Guide
Industrial buyers should verify supplier capability to handle reactive compounds, requesting documentation of purity analysis (typically by GC-MS) and moisture content certification. Bulk shipments require temperature-controlled containers with pressure relief systems. Technical specifications should clearly define: minimum purity (electronic grade ≥99.99%), maximum oxygen/moisture content (<1 ppm), and preferred delivery format (gas cylinders or stabilized solutions). Consider suppliers with ISO 9001 certification for hazardous chemical handling and established logistics for reactive materials.
Related Manufacturers
- 主营：苄基三甲基氯化铵、聚苯胺、脯氨酸甲酯盐酸盐
- 主营：全氟三丁胺、异丙醇铝、纳米勃姆石、二苄叉山梨醇、六氟丙烯二聚体、六氟环氧丙烷二聚体、二异戊基硫醚、隐色结晶紫、邻菲罗啉
- 主营：叔碳酸、十八醛、溶菌酶、癸二醇、邻苯二甲、乙基碳二、烷二甲醇、癸烷撑二醇、海藻糖、氨基丙基、氢路噻嗪、羟基癸酸、正十七烷、谷胱甘肽、松果体素、vc磷酸酯镁、2-甲基丁醛、朱栾倍半萜、丁烷四乙酸、表面活性剂、缩水甘油邻、10-羟基羊蜡酸、氢氯噻嗪杂质、盐酸邻菲罗啉、壳聚糖季铵盐
- 主营：聚乙二醇、聚丙二醇、叔胺、伯胺、染料中间体
- 主营：杜仲素、对位酯、丙烯酸酯、二氧化硫脲、二苯基硅二醇、乙基麦芽酚、饲料添加剂、油酸基硬脂酸
- 主营：2-甲基咪唑、咪唑、对甲苯磺酸、4-对二氯苄、二氢茉莉酮酸甲酯、对苯二甲酸、甲基三乙氧基硅烷、乙二胺四乙酸二钾、防染盐S、黄血盐钾、聚六亚甲基胍盐酸盐、红丹粉、黄丹粉、巴豆酸、巴豆醛、氢氧化钡、三硫代碳酸钠、丙酮肟、九水硫化钠、碱式碳酸铅、乙醛肟、氟化钾、氟化钠、醋酸铅
- 主营：橡胶油、白芷油、7782-92-5、二甲基、pbtcaona4、艾叶油、桉树醇、2905-60-4、5989-81-1、重质苯、活性炭、1305-62-0、1192-62-7、安息油、9005-32-7、正辛烷、7775-27-1、8050-09-7、1739-84-0、7786-30-3、黄糊精、6920-22-5、三辛胺、1897-52-5、7727-21-1
- 主营：9004-32-4、磷铁粉、9003-28-5、硅橡胶、干燥剂、防腐剂、聚氨酯、柠檬黄、9002-89-5、9003-05-8、清洗剂、8050-09-7、增湿剂、葡萄糖、9000-59-3、洗涤剂、增稠剂、脱水剂、固化剂、着色剂、碳酸镍、10028-22-5、19513-05-4、cas76-59-5、11138-66-2
- 主营：杂环化合物、丙烯酸系列
- 主营：十一烷、水杨羟肟酸、表面活性剂、均苯四甲酸二酐、芥酸酰胺丙基二甲基叔胺、十二烷基双羟乙基甲基、中间体、月桂酸钠、肌氨酸钠、苄基胂酸
- 主营：生物活性玻璃、全氟三丁胺、花椒麻素、二羟基丙酮、2-十一酮、光引发剂、乙酸龙脑酯、羟基磷灰石
- 主营：碘甲苯、阻燃剂、碘丙烷、3.4-二氟、2-丙二醇、碘丁烷、溴苯胺、碘癸烷、苯乙酮、碘苯胺、碘乙烷、苯甲酸、溴苯酚、苯甲腈、cas627-30-5、cas766-85-8、1-碘辛烷、1-碘己烷、cas107-05-1、cas585-79-5、cas150-19-6、ab黑白料、cas831-82-3、苯甲酰胺、聚碳酸酯
- 主营：脱模剂、中间体、抗氧剂、乙二氧基、邻苯二甲、二氧基噻吩、粘合剂、固化剂、染色助剂、防灰雾剂、乙基己醇、丙烯酰氯、光盘涂料、2-氯丙酰氯、4-氨基苄醇、3-氯丙酰氯、表面活性剂、1-金刚烷甲醇、1-溴-4-氯丁烷、对氨基苯甲醇、羧甲基纤维素、四氢呋喃甲醇、1-氯-6-羟基己烷、纳米管复合材料、全氟辛基乙基醇
- 主营：苯甲醛、添加剂、赖氨酸、二甲基亚砜、工业级二茂铁、二甲基硅氧烷、二苄基甲酮肟、双环戊二烯合铁、溴甲醚、催化剂、粘合剂、中间体、液体尿素、化学试剂、三乙醇胺、有机肥料、尿素硝铵、无水三甲胺、国标防腐剂、溴甲基甲基醚、n-甲基吡咯烷酮、气相色谱固定液、十五烷基磺酰氯、六甲基磷酰三胺、七氟溴丙烷
- 主营：四甲基氢氧化铵、双乙烯酮、环氧环己烷、均苯四甲酸二酐、甲基丙烯酸十八酯、异丙叉丙酮、三聚甲醛、双季戊四醇、十一烷、水杨羟肟酸、硫氢化钠