Explanatory notes
… Colourless when pure, otherwise yellowish; soluble in water. Its uses include the pickling of metals, in the … or prisms, or hydrated in colourless needles. Soluble in water. Used in the manufacture of very hard cement (e.g., … or garnet‑coloured masses, deliquescent and soluble in water, or hydrated (with 5 or 12 H 2 O) in orange‑coloured, …