Bearing the Mark of Tin Chemical Excellence

Manufactured chemicals benefit mankind in many ways, including alleviating and curing disease, boosting food production and serving as the catalyst for countless useful products. Unlike some chemicals, tin is an extremely safe element. Mason manufactures and/or markets tin-based chemicals such as stannic chloride, used to toughen glass, to stabilize PVC plastic against heat, to prepare electroconductive coatings for solar collectors and a broad range of other applications. We also produce stannous chloride, used in pharmaceutical manufacturing as well as for thin film plating of electrical connectors. Mason also markets a line of tin-plating chemicals including potassium stannate, sodium stannate and stannous sulfate. Other products include stannous chloride dihydrate that acts as a catalyst and sensitizing agent for glass and plastic; stannic chloride pentahydrate and stannous oxide, a component in ruby glass. Above all, we are still involved in our original business - high purity tin recovered from process concentrates. Many manufacturing processes result in concentrates bearing metals including tin. Mason processees these concentrates that might otherwise result in disposal problems by treating them with sodium hydroxide (lye) to precipitate the metals. The resulting effluent is clear water that goes to the municipal sewer. Even the dust has value at Mason. It's collected in bag houses and sold, along with other tin concentrates, to smelters worldwide. In fact, tin smelters prefer Mason's tin concentrates over tin cassiterite from Bolivia and other tin producing countries, which is only 20% tin but high in lead, sulfur and other heavy metals. Mason's tin concentrates are low in heavy metals and contain fluxing agents. For that reason, Mason receives a premium for these tin materials. Mason tin and tin-based chemicals are marketed to manufacturers worldwide. Mason Product Descriptions: Stannic Chloride Stannous Chloride Other Tin-Based Chemicals from Mason Stannic Chloride (SnCl4) from Mason Toughens Glass As hot glass is released from the mold into a spray or vapor of stannic chloride, a thin film of tin oxide is deposited on the surface of the glass. The film imparts a scratch and scuff resistance to glassware such as bottles and jars used for food and beveragees. The toughening effect allows for lighter weight glassware and faster production lines because the treated glass is less fragile. Provides Electroconductive Coatings for Solar Collectors A thin tin oxide coating on glass panels used in solar collectors provides an electroconductive path for the energy collected by the panels. Stabilizes PVC Plastics Against Heat Unstabilized PVC can be degraded by heat and other forms of radiation. Stannic chloride acts as an intermediate in the formation of organotin compounds such as thiotin, one of the most efficient heat stabilizers available. It also imparts exceptional clarity to the product which can be used for blow-molded soft drink and cooking oil bottles and other applications where high transparency is desirable. Other Uses: Stannic Chloride serves as a chemical intermediate in the manufacture of: pharmaceuticals polymers resins urethane pesticides paints fungicides wood preservatives electroconductive coatings security alarm glazing de-icing of windshields Physical Properties: Sp. G - 2.226 MW - 260.5 Wt. per gallon - 18.59 Boiling point - 114 degrees C (238 degrees F) Freezing point - -33 degrees C (-28 degrees F) Shipping Containers: 185 pound, 450 pound and 2000 pound returnable steel cylinders Stannous Chloride (SnCl2) from Mason Sensitizes Glass and Plastic for Metalizing Stannous chloride is used for metallic surfaces or glass and plastic as a sensitizing agent in preparing glass and plastic for metalizing. Examples include mirrors, metalized glazing and electronic components on a plastic base. Produces Thin Film Plating Tin-nickel, plated from an electrolyte containing stannous chloride, provides a hard, bright, corrosing-resistant finish. It is also used to provide an etch-resistant coating in the manufacture of printed circuit boards. Pharmaceutical Manufacturing Stannous chloride is used as an intermediate catalyst in the production of many pharmaceutical products. Other Uses: Stannous chloride acts as a sensitizing agent, reducing agent, intermediate for tin chemical manufacture, antioxidant and soldering flux. Also in the manufacture of: resins urethane pharmaceuticals polymers pesticides fixes and/or develops color in dyeing sensitizes glass aor plastic for metalizing tanning agent food and beverage preservative a catalyst in petrochemical refining aluminum anodizing oral healthcare Physical Properties: MW - 189.60 Melting Point - 246.0 C Shipping Containers: 50 pound and 100 pound fiber drums Other Mason Quality Tin Plating and Tin-Based Chemicals Potassium Stannate - K2SnO3-3H20 An alkaline tin plating electrolyte that produces a high quality deposit. Also used for immersion tinning of aluminum alloys. Non-corrosive to steel plating tanks. Higher cathodic current density and more concentrated solutions are possible than with sodium stannate resulting in faster plating rates. Physical properties: Molecular Wt. - 298.94 Specific Gravity - 3.2 Shipping Containers: 50 and 100 pound fiber drums Sodium Stannate - Na2Sn03-3H20 Similar in use ot Potassium Stannate, but with lower current densities and slower dposition. Sodium Stannate is also used in manufacturing blueprint paper and as a stabilizer for hydrogen peroxide. Physical properties: Molecular Wt. - 266.71 Shipping Containers: 50 and 100 pound fiber drums Stannous Sulfate - SnSO4 Used in acid tin electroplating baths, liquor finishing and drawing of steel wire. Delivers a high current efficiency and smooth, fine grained deposits. A bright finish can be obtained by flow melting or through the use of certain additives. Physical properties: Molecular Wt. - 214.75 Decomposes - 360 degrees C Specific Gravity - 5.13 Shipping Containers: 50 and 100 pound fiber drums Stannous Chloride-Dihydrate - SnCl2-2H20 Used in immersion tinning, as a reducing agent, catalyst and a sensitizing agent for glass and plastics before plating. Also acts as an intermediate in tin chemical manufacture, as a soldering flux, in acid electro-tin plating, as an anti-oxidant and a corrosion inhibitor in canned carbonated soft drinks. Physical Properties: Molecular Wt. - 225.63 Melting Point - 38 degrees C Shipping Containers: 50 and 100 pound fiber drums Stannous Oxide - Sn0 An intermediated in the manufacture of stannous salts and as a component of ruby glass. Physical Properties: Molecular Wt. - 134.69 Decomposes - 700 - 950 degrees C Specific Gravity - 6.95 Shipping Containers: 50 and 100 pound fiber drums Stannic Chloride Pentahydrate - SnCl4-5H20 An easier-to-handle solid than the anhydrous form if the presence of water is acceptable. Physical Properties: Molecular Wt. - 350.58 Melting Point - 56 degrees C Shipping Containers: 50 and 100 pound fiber drums

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