11. The propellant was monomethyl hydrazine and nitrogen tetroxide . 12. This method involves adding a high concentration of formamide to a osmium tetroxide fixative. 13. Some of these are extremely dangerous and carcinogenic substances, including hydrazine and nitrogen tetroxide . 14. Osmium tetroxide boils at 130 �oxidizing agent. 15. This dramatically reduces the amount of the highly toxic and very expensive osmium tetroxide needed. 16. The two storable liquid fuel core stages used Aerozine 50 fuel and nitrogen tetroxide oxidizer. 17. The freezing point of pure nitrogen tetroxide is, while MON3 is and MON25 is. 18. The steering jet failed and began leaking nitrogen tetroxide shortly after Discovery reached orbit early Friday. 19. Dinitrogen tetroxide can also be made through the reaction of concentrated nitric acid and metallic copper. 20. This uses a catalytic loading of osmium tetroxide which is regenerated in situ by the periodate.
