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Pyrosulfate

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A pyrosulfate was a chemical compound containing the pyrosulfate ion, S2O72-, composed of sulfur and oxygen.

In 2152, a Retellian freighter expelled a cloud of dilithium hydroxyls and ionized pyrosulfates into the Enterprise's path, clogging the plasma vents and preventing the Enterprise from engaging its warp drive. (ENT: "Precious Cargo")

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