Stannous Chloride Dihydrate BP
Abstract
Tin(II) chloride, also known as stannous chloride, is a white crystalline solid with the formula SnCl2. It forms a stable dihydrate, but aqueous solutions tend to undergo hydrolysis, particularly if hot.
Use/Application:
SnCl2 is widely used as a reducing agent (in acid solution). Stannous chloride is also added as a food additive with E number E512 to some canned and bottled foods, where it serves as a color-retention agent and antioxidant.
Identity
Chemical Name: Stannous Chloride Dihydrate
Chemical Formula: SnCl2.2H2O
Molecular Weight: 225.6 g/mol
CAS No: 7772-99-8
Other Name: Tin Dichloride
General Specifications
| Test | Specification |
| Characters | It occurs as white or almost white, crystalline powder or colorless crystals, efflorescent in air. |
| Identification
Test A Test B
Test C |
a) Specified Test. A blackish-grey precipitate is formed b) Specified Test. The precipitate dissolves and the resulting solution is clear & colorless c) The solution gives positive tests for chlorides. |
| Solubility | Freely soluble in water (the solution becomes cloudy after standing or on dilution) and ethanol. It dissolves in dilute hydrochloric acid. |
| Appearance of Solution | The solution is clear and colorless |
| Substances not precipitated by thioacetamide | Not more than 0.2% |
| Sulfates | Not more than 500 ppm |
| Iron | Not more than 100 ppm |
| Heavy Metals | Not more than 50 ppm |
| Assay | Not less than 98.0% and not more than 102.0% |
Shelf life, Storage and Packing
It should be stored in a segregated area in a cool and ventilated place away from combustible materials. Keep in a tightly closed container, sealed until ready for use. It is packed in 25kg or 50kg HDPE bags or drums as required.
Other
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We observe WHO Good manufacturing practice and Good laboratory practice.
