21651-19-4 Usage
Description
TIN(II) OXIDE, also known as stannous oxide or cassiterite, is a brownish-black powder or black to blue-black crystalline solid with a characteristic odor. It is a reducing agent and is insoluble in water but soluble in acids and alkalis, with slight solubility in ammonium chloride. TIN(II) OXIDE is incompatible with acids and/or alkalis and has a melting point of 1080°C, at which it decomposes. Its density is 6.45 g/cm3, and it forms tetragonal crystals.
Uses
1. Used in Chemical Industry:
TIN(II) OXIDE is used as a reducing agent for the preparation of stannous salts.
2. Used in Manufacturing Industry:
TIN(II) OXIDE is used as a soft abrasive putty powder.
3. Used in Glass Industry:
TIN(II) OXIDE is used in the manufacture of copper ruby glass.
4. Used in Illumination Industry:
TIN(II) OXIDE is used for illumination with UV light.
Preparation
Tin(II) oxide is prepared by heating tin(II) hydroxide. The latter is obtained as a white precipitate by reacting Sn2+ ions with hydroxide ions:
Sn2+(aq) + 2OHˉ(aq) → Sn(OH)2 (s)
Reactivity Profile
TIN(II) OXIDE is a reducing agent. Unstable in air due to slow oxidation to tin(IV) oxide. At 300°C this oxidation proceeds incandescently. Incompatible with strong oxidizing agents. Reacts with acids and with strong bases.
Check Digit Verification of cas no
The CAS Registry Mumber 21651-19-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,6,5 and 1 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21651-19:
(7*2)+(6*1)+(5*6)+(4*5)+(3*1)+(2*1)+(1*9)=84
84 % 10 = 4
So 21651-19-4 is a valid CAS Registry Number.
InChI:InChI=1/O.Sn/rOSn/c1-2
