The iron wool burns vigorously with a bright flame, forming a brown solid after the reaction.
2KMnO4 + 16HCl → 2KCl + 2MnCl2 + 5Cl2 + 8H2O
The iron wool glows brightly but less vigorously. A brown solid is formed.
Bromine reacts with iron to form brown iron(III) bromide.