REAXIS® C162, Stannous Chloride Anhydrous also known as Anhydrous Stannous Chloride or Tin Dichloride, is a versatile high metal content inorganic stannous tin that is used in several reactions. REAXIS® C162 is produced to the highest standards utilizing high-purity tin metal while minimizing stannic and maximizing stannous content. Anhydrous stannous chloride is differentiated from the dihydrate form, known as REAXIS® C154, in a few different ways. REAXIS® C162 has a higher percentage of active stannous tin, is less hygroscopic and has a higher melting temperature than REAXIS® C154. The latter two characteristics result in a more stable product. Stability/free-flowability can be enhanced via blends with various products including silica, talc, and numerous solid resins. REAXIS® C162 is present on a wide range of international regulatory inventories and can be used in formulations requiring USFDA compliance, making it a great choice for international formula development.
|Stannous Tin (%)||62.2|
|Fe (ppm)||50 Max|
|Pb (ppm)||75 Max|
Common end-use chemistries and applications for REAXIS® C162 include: esterifications, thermoplastic elastomers, personal care, surface finishing, oil well simulation (acidizing additive), corrosion inhibition, and glass (silver mirroring and color modifier). As a catalyst, REAXIS® C162 plays a crucial role in the esterification process, which is fundamental to the production of various poly- and monomeric esters. REAXIS® C162 is ideal in esterifications due to its high catalytically active stannous tin content and minimal moisture content. Stannous chloride anhydrous, as a reducing agent, finds diverse applications and benefits in various applications such as those applications requiring the reduction of silver used for mirror coatings. In electroplating, it serves as a primary reducing agent to deposit metal layers, such as silver or tin, onto a wide range of substrates. By donating electrons, REAXIS® C162 reduces the metal ions to their corresponding metallic forms, which adhere to the substrate’s surface. This process results in a uniform, thin coating that improves the final product’s appearance, durability, and corrosion resistance.
Due to its high tin concentration and small ligand, REAXIS® C162 is a very active esterification catalyst with comparable reactivity to common organotin catalysts such as dibutyl and monobutyl tin oxides. Given its inorganic tin nature, REAXIS® C162 is stable at high reaction temperatures typical of many esterification reactions. Due to the presence of chlorides, color formation may be an issue with some ester formulations.
REAXIS® C162 should be stored in the original packaging. The container should be closed tightly after each use to maximize shelf life. Characteristic of most inorganic tins (Sn(II)), the primary cause of instability would be oxidation, where the signs of oxidation would be the yellowing of the white crystals. Additionally, REAXIS® C162 is slightly hygroscopic.