A solution is produced which contains ferric hydrate dissolved in ferric chloride, with free chloride of ammonium.
From a mixture of muriate of iron (ferric chloride) and spirit of tar.
One drop of a dilute solution of ferric chloride added to a solution of 20 mgrms.
The ferrous chloride formed at the same time is converted into ferric chloride which can be used to moisten the heaps.
The acetate of morphine, and morphine itself, when added to ferric chloride solution, develop a blue colour.
If the commercial acid is not available, the pure acid may be used, but a few drops of ferric chloride must be added.
Amyl alcohol dissolves small quantities of meconic acid, identified by striking a blood-red colour with ferric chloride.
It gave a bluish-black color with impure ferrous sulphate and a dark color with ferric chloride.
A small portion of the tar residue in alcoholic solution gave a color reaction with ferric chloride.
The first part was treated with ferric chloride, but it gave no color reaction.