Page Views: 120 Date Added: 02/11/2011 Last Updated: 02/11/2011 Expiry Date: 02/08/2021 Product/Service Details 15-Crown-5 CAS:33100-27-5 Packing:250KG/DRUM English Name:15-Crown-5 Alias:1,4,10,13-Pentaoxacyclopentadecane;1,4,7,10,13-Pentaoxa-cyclo-pentadecane;Crownethers;Ethyleneoxidecyclicpentamer Molecular Formula:C10H20O5 Molecular Wt:230 Appearance:Colorless transparent liquid Purity≥98.0% Water（KF）≤0.1% Indications and usage The main character of Crown Ether is that it can combine Metal Salts, Ammonium SaltS, organic cation compounds and so on to become stable complex compound. Using this character, it can dissolve all kinds of salts in organic solvents. Crown Ether can chelate cation, and because of possessing of the facing outer organic genes, it can also dissolve in nonpolar organic solvents. At this time, the undissolved anions exist in solvents in the nude. Just for this, it has extremely high activity. Because. Crown Ether can make organic alkali metal dissolve in organic solvents , it is widely used in areas such as organic compounding , optical resolution, heavy metals chelating, detaching and fractionation, pharmaceutical and biochemical in biological activity and so on. For example, it can used as phase shifting catalysts which can make those reactions that cannot act in traditional conditions react smoothly. These reactions are charactered with high speed, productivity which is convenient, and can react in common condition. For example, the Condensation of Benzoin in water solution has lower productivity, while adding in 7% of Crown Ether, we can get 78% of Benzoin. This reaction can also happen in Benzene (or Acetonitrile). Although, Potassium Cyanide cannot dissolve in Benzene, adding in 18-Crown -6, it can not only make the reaction possible, but also make its productivity up to 95%. The toxicity of 18-Crown-6: lethal dose for mouse: 300mg/kg.Irritative to eyes and skin. Method of production: Commonly producing with Williamlin synthesis, accordingly, making Alkoxide react with Alkylogen.

Company Information (Nanjing Asian Chem Co.,Ltd)

Company Profile: Asianchem is a highly new technical enterprise specialized in R&D,manufacturing pharmaceutical intermediate and biochemicals. We own manufacture bases in Zhejiang, Shandong and other places. We have a professional, efficient sales team. Our R & D strength is strong and we cooperate with a number of colleges and universities at home and abroad long-term .80 percent of our products are exported. We have experience of many years in medical ,electronic chemical field and have a good reputation. 　　 Under strict quality control of the production of pharmaceutical raw materials in accordance with the GMP standard ICH Q7A, we passed the ISO9001 system quality in 2002...... >> More Website URL: http://www.bridgat.com/u25905