With borax bead on platinum wire. In O. F. dissolves to a colorless glass.
With Co(NO3)2.____
3. Arsenic, As2O3.—Before the Bp. on Ch. Very volatile. Strong garlic odor to fumes.
Before the Bp. on Ch. with Na2CO3. Reduced with emission of arsenical fumes.
In ignition tube with Na2CO3 and Ch. Volatilizes, forming a mirror-like deposit of metallic As in the cooler part of tube.
In flame on platinum wire____
With borax bead on platinum wire____
With Co(NO3)2.____
4. Bismuth, Bi2O3.—Before the Bp. on Ch. Yields a coating—orange-yellow when hot, lemon-yellow when cold. The yellow coating usually has a white outline.