Appearance: White, waxy, opaque crystals ; White hygroscopic solid in various forms ; Colorless to white, odorless solid (flakes, beads, granular form).
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Fe(OH)2 – Iron(II) hydroxide
Other names: Ferrous hydroxide
Appearance: Green solid
Na2SO4
Names: Sodium sulfate, Sodium sulphate, Sulfate of sodium
Appearance: White crystalline solid | hygroscopic ; White hygroscopic solid in various forms