Sedative used for sleep disorders.

Solid crystalline water-based compound.

Frozen methane and water compound.

Expectorant for coughs and congestion.

Sodium hydrate: strong base, caustic.

Clathrate hydrates, or gas hydrates, clathrates, or hydrates, are crystalline water-based solids physically resembling ice, in which small non-polar molecules (typically gases) or polar molecules with large hydrophobic moieties are trapped inside "cages" of hydrogen bonded, frozen water molecules.

Calcium hydrate: Hydrated form of calcium.

Hydrated form of aluminum oxide.

Calcium hydroxide, used in construction.