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Rubidium sulfate is the rubidium salt of sulfuric acid.
R 1364 (OTTO) Rubidium sulphate, GR 99%+ - is used in hematology stain. It is also used as the raw materials for making kinds of Rubidium salts. It is fused on a ceramic bead and used as thermoionic detector. It is also used as a cathartic.