1. Ruthenium tetroxide is a potential staining agent.

2. Silver, gold, platinum, osmium, iridium, rhodium and ruthenium and their alloys

3. Method for the asymmetric dihydroxylation of olefins, using osmium catalysts

4. In reptiles, agranular endoplasmic reticulum in many olfactory sensory cell perikarya shows a definite affinity for binding osmium.

5. Aerozine 50 is hypergolic with the Titan II's oxidizer, nitrogen tetroxide; i.e., they spontaneously ignite on contact with each other.

6. The presence of the radioactive isotope rhenium-187 and its daughter isotope osmium-187 provides a useful geochronologic dating technique.

7. Chloroform explodes when in contact with aluminum powder or magnesium powder or with alkali metals (e.g., lithium, sodium, and potassium) and dinitrogen tetroxide

8. He had tubes made with Anticathodes of Platinum, Osmium, and Iridium, of Palladium and Rhodium, and of Copper and Nickel

9. Osmium alloys collected from alluvial deposits that are mixed with gold have yielded invaluable clues about the formation of the Earth's continental crust.

10. Antimonic oxide is converted on ignition into the tetroxide (Sb2O4) with loss of oxygen. A Textbook of Assaying: For the Use of Those Connected with Mines

11. Ruthenium tetroxide is a highly aggressive oxidant, but its one-electron reduced derivative is a mild oxidizing agent for the conversion of alcohols to aldehydes.

12. The largest known primary reserves are in the Bushveld Igneous Complex in South Africa, though the large copper–nickel deposits near Norilsk in Russia, and the Sudbury Basin in Canada are also significant sources of osmium.

13. Iridium (or sometimes platinum alloys or osmium) and mostly iridium alloys have a low wear and are used, for example, for multi-pored spinnerets, through which a plastic polymer melt is extruded to form fibers, such as rayon.

14. The metathesis catalyst is a ruthenium or osmium carbene complex catalyst, such as one containing an alkylidene ligand with basicity higher than that of tricyclohexylphosphine (PCY3) and a neutral electron donor ligand with a basicity lower than that of PCy3, whereby the catalyst initiates the metathesis reaction of the composition upon mixing with the substrate.

15. In a process for producing polycarboxylic acids or their salts from polysaccharides by oxidation with nitrogen dioxide/dinitrogen tetroxide with the conversion of at least a part of the primary alcohol groups of the polysaccharides into carboxyl groups and where appropriate the at least partial neutralisation of the carboxylic acid groups produced, the reaction time required is to be shortened and the necessary quantity of nitrogen dioxide reduced.

16. The present invention leaches platinum groups from industrial waste containing platinum group metals (platinum (Pt), ruthenium (Ru), osmium (Os), rhodium (Rh), iridium (Ir), palladium (Pd)), adsorbs onto an absorbent platinum group metal ions inside a leachate, desorbs the platinum group metal ions attached to the adsorbent using a desorbent to recover high concentration platinum group metal ion mixed solution, and also, recover the platinum group metal ions in the metallic form by ashing the adsorbent having the platinum group metal ions attached thereto.