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201030 SIGMA-ALDRICH Osmium tetroxide ReagentPlus®, 99.8% Synonym: ‘Osmic acid’, Osmium(VIII)-oxide CAS Number 20816-12-0 Linear Formula OsO4 Molecular Weight 254.23 grade ReagentPlus® vapor density 8.8 (vs air) vapor pressure 7 mmHg ( 20 °C) assay 99.8% form crystalline powder bp 130 °C(lit.) mp 39.5-41 °C(lit.) storage temp. 2-8°C
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