Tin (II) chloride, dihydrate, not to be confused with Tin (II) chloride, anhydrous, is created through dissolving tin in hydrochloric acid. This is followed by evaporation and crystallization. Tin (II) chloride, dihydrate, then, is colorless and crystal-like in appearance, and it attracts oxygen from the air. It is also transformed to insoluble oxychloride, which is a two part composite—oxygen and chlorine—with a contributing element or basic chloride. Other terms for Tin (II) chloride, dihydrate include stannous chloride.
Facts about Tin (II) chloride, dihydrate:
- a mass of 2.71
- a melting point of 37.7 degrees Celsius
- water, alkalies, tartaric acid and alcohol solubility
Tin (II) chloride, anhydrous, also known as stannous chloride or tin dichloride, is colorless with orthorhombic crystals. It has a melting point of 246 degrees Celsius, a boiling point of 246 degrees Celsius, and a density of 3.90. It is soluble in less than its own mass in water. Solubility increases in hydrochloric acid. Other solubility helpers include:
- ethyl acetate
- glacial acetic acid
- sodium hydroxide solution
Tin (II) Chloride, Dihydrate Uses
Tin (II) chloride, dihydrate is a powerful reducing agent utilized in numerous industrial processes. As an ingredient, Tin (II) chloride, dihydrate is also a major component of acid tin plating baths—a practice that is more than 100 years old.
Stannous chloride may also be used:
- as a caustics found in dyeing
- as a lubricating oil stabilizer
- as a fragrance or soap additive
- as a stain remover
- as an agent for glass, paper, and plastics
- as laboratory or research material
- as a reducing agent in chemical manufacturing—polymers for example
- in tin galvanizing
- as a source of tin in radiopharmaceutical kits
Tin (II) Chloride, Anhydrous Uses
Tin (II) chloride, anhydrous can be used as an intermediate or as a plating and surface treating agent. It is also known as tin dichloride.
Safety Precautions When Handling Tin (II) Chloride
Tin dihydrate and tin anhydrous chlorides should be handled with caution. These compounds may be irritating to the skin and eyes and cause other complications.
Handling precautions recommended by the Centers for Disease Control and Prevention include:
- Local exhaust or breathing protection such as a simple mask
- Protective gloves to avoid skin contact
- Safety goggles or other eye protection
- Do not eat, drink, or smoke while handing stannous tin chloride
Stannous chloride has been used in various capacities for a very long time, and the benefits seem to outweigh the risks. Following a few simple safety precautions—similar to the steps taken when handling any chemical—is the best course.
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