Analysis of the metabolite markers of azathioprine (AZA) and mercaptopurine (6-MP), including 6-methyl-mercaptopurine ribonucleotides (6-MMRP) and 6-thioguanine nucleotides (6-TGN), is considered investigational.
Though the temperature of the inner core of the Earth is about 5700 degrees, (about as hot as the surface of the Sun) the pressure is also very high, about 3.3 - 3.6 million aâ¦tmospheres. At these pressures the material is solid, as has been confirmed in lab tests.
The inner core, which is about 750 miles thick, is made primarily of iron. Unlike the outer core, the inner core is mostly solid. Although the iron in the inner core is even hotter (10,000Âº F or more â as hot as the surface of the Sun!) than the outer core, the intense pressure from the rest of the planet is so great that the iron cannot melt.