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    Osmium tetroxide

    1. Molecular Structure

    Osmium tetroxide 2D Structure

    2. Chemical Identity

    PropertyValue
    IUPAC Nametetraoxoosmium
    Molecular FormulaO4Os
    SMILESO=[Os](=O)(=O)=O

    3. Chemical Properties

    PropertyValue
    Molecular Weight254.2 g/mol
    TPSA68.3 Ų
    LogPN/A
    Formal Charge0

    4. Experimental Properties

    PropertyValue
    Boiling Point130.0 °C at 760 mm Hg; begins to sublime and distill well below bp
    Melting Point40.6 °C
    Density5.1 @25 °C
    SolubilitySolubility (g/100 cc solvent): 5.70 g in water @ 10 °C; 6.23 g in water @ 25 °C; 250 +/- 10 g in carbon tetrachloride @ 20 °C
    Flash PointNo data available
    Autoignition TempNo data available

    5. Supplier Suggestions

    SupplierWebsiteLocation
    Sigma Aldrich/MerckVisit MerckInternational
    LennoxVisit LennoxIreland
    Doc SolderVisit Doc SolderIreland

    6. GHS Safety & Hazards

    Signal Word
    Danger
    GHS PictogramGHS PictogramGHS Pictogram

    Hazard Statements

    • H300 (100%): Fatal if swallowed [Danger Acute toxicity, oral]
    • H300: Fatal if swallowed [Danger Acute toxicity, oral]
    • H301: Toxic if swallowed [Danger Acute toxicity, oral]
    • H310 (100%): Fatal in contact with skin [Danger Acute toxicity, dermal]
    • H310: Fatal in contact with skin [Danger Acute toxicity, dermal]
    • H314 (100%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
    • H314: Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
    • H318: Causes serious eye damage [Danger Serious eye damage/eye irritation]
    • H330 (100%): Fatal if inhaled [Danger Acute toxicity, inhalation]
    • H330: Fatal if inhaled [Danger Acute toxicity, inhalation]
    • H334 (70.7%): May cause allergy or asthma symptoms or breathing difficulties if inhaled [Danger Sensitization, respiratory]
    • H370: Causes damage to organs [Danger Specific target organ toxicity, single exposure]
    • H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]
    • H373: May causes damage to organs through prolonged or repeated exposure [Warning Specific target organ toxicity, repeated exposure]

    Precautionary Statements

    • P233, P260, P262, P264, P270, P271, P280, P284, P301+P316, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P320, P321, P330, P342+P316, P361+P364, P363, P403, P403+P233, P405, and P501 (click each P-code to see the statement)
    • P260, P262, P264, P270, P271, P280, P284, P301+P316, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P320, P321, P330, P361+P364, P363, P403+P233, P405, and P501 (click each P-code to see the statement)
    • P260, P264, P264+P265, P270, P271, P280, P284, P301+P316, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P308+P316, P316, P317, P319, P320, P321, P330, P363, P403+P233, P405, and P501 (click each P-code to see the statement)
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