Explanatory notes
… or blackish masses or powder (specific gravity about 5), insoluble in water. A very powerful oxidising agent. … ). (2) Manganese oxide (MnO). Greyish or greenish powder, insoluble in water. Specific gravity about 5.1. Used in … basic. Brown or black powder (specific gravity about 4.8), insoluble in water. Uses include : in textile printing, as a …