It is prepared from nitrobenzene by reducing it with stannous chloride and sodium hydroxide.
stannous chloride is usually sufficiently contaminated with stannic salt.
The colour is developed gradually as the temperature rises; it may be rendered brighter by the addition of stannous chloride.
Note the quantity of the stannous chloride solution required.
Boiling with stannous chloride solution reduces it to the metal; digestion with potassium iodide gives mercurous iodide.
These reactions are characteristic of tin as stannous chloride.
The antimony is precipitated as metal, and the tin remains in solution as stannous chloride.
stannous chloride (protomuriate of tin), produces an isabel yellow precipitate.
Wool is dyed in single bath by boiling with a mixture of Flavine (8%), stannous chloride (4%) and oxalic acid (2%).
In some instances alum and cream of tartar are used instead of the stannous chloride.