Input interpretation
![osmium tetroxide](../image_source/e901a9fd4a8692c72a5cf0cbd6380aa9.png)
osmium tetroxide
Chemical names and formulas
![formula | OsO_4 Hill formula | O_4Os name | osmium tetroxide IUPAC name | tetraoxoosmium alternate names | osmic acid | osmic acid anhydride | osmium oxide | osmium tetraoxide | osmium(VIII) oxide | tetraketoosmium | tetraoxoosmium mass fractions | O (oxygen) 25.2% | Os (osmium) 74.8%](../image_source/71904b8e6f110f2b8a2a9888e3d87bab.png)
formula | OsO_4 Hill formula | O_4Os name | osmium tetroxide IUPAC name | tetraoxoosmium alternate names | osmic acid | osmic acid anhydride | osmium oxide | osmium tetraoxide | osmium(VIII) oxide | tetraketoosmium | tetraoxoosmium mass fractions | O (oxygen) 25.2% | Os (osmium) 74.8%
Structure diagram
![Structure diagram](../image_source/6f2a80d8634e8a840ca03079ebcaee45.png)
Structure diagram
![vertex count | 5 edge count | 4 Schultz index | 64 Wiener index | 16 Hosoya index | 5 Balaban index | 3.024](../image_source/755dd64d75c531728dd3e2b36e269553.png)
vertex count | 5 edge count | 4 Schultz index | 64 Wiener index | 16 Hosoya index | 5 Balaban index | 3.024
Basic properties
![molar mass | 254.23 g/mol phase | solid (at STP) melting point | 40 °C boiling point | 130 °C density | 1.04 g/cm^3](../image_source/ba2bfd0d35b42080bb912fbd90bb12f2.png)
molar mass | 254.23 g/mol phase | solid (at STP) melting point | 40 °C boiling point | 130 °C density | 1.04 g/cm^3
Units
Solid properties (at STP)
![density | 1.04 g/cm^3 vapor pressure | 0.78 mmHg (at 0 °C)](../image_source/5ede545d204f2fcb87e02f2a7ba64882.png)
density | 1.04 g/cm^3 vapor pressure | 0.78 mmHg (at 0 °C)
Units
Thermodynamic properties
![specific heat capacity c_p | gas | 0.2915 J/(g K) molar heat capacity c_p | gas | 74.1 J/(mol K) specific free energy of formation Δ_fG° | gas | -1.152 kJ/g | solid | -1.199 kJ/g molar free energy of formation Δ_fG° | gas | -292.8 kJ/mol | solid | -304.9 kJ/mol specific heat of formation Δ_fH° | gas | -1.326 kJ/g | solid | -1.55 kJ/g molar heat of formation Δ_fH° | gas | -337.2 kJ/mol | solid | -394.1 kJ/mol molar heat of vaporization | 36.4 kJ/mol | specific heat of vaporization | 0.143 kJ/g | molar heat of fusion | 14.3 kJ/mol | specific heat of fusion | 0.0562 kJ/g | critical temperature | 678 K | critical pressure | 1.7 MPa | (at STP)](../image_source/dbf5abba07e5ce28f58e338238ca9740.png)
specific heat capacity c_p | gas | 0.2915 J/(g K) molar heat capacity c_p | gas | 74.1 J/(mol K) specific free energy of formation Δ_fG° | gas | -1.152 kJ/g | solid | -1.199 kJ/g molar free energy of formation Δ_fG° | gas | -292.8 kJ/mol | solid | -304.9 kJ/mol specific heat of formation Δ_fH° | gas | -1.326 kJ/g | solid | -1.55 kJ/g molar heat of formation Δ_fH° | gas | -337.2 kJ/mol | solid | -394.1 kJ/mol molar heat of vaporization | 36.4 kJ/mol | specific heat of vaporization | 0.143 kJ/g | molar heat of fusion | 14.3 kJ/mol | specific heat of fusion | 0.0562 kJ/g | critical temperature | 678 K | critical pressure | 1.7 MPa | (at STP)
Chemical identifiers
![CAS number | 20816-12-0 PubChem CID number | 30318 PubChem SID number | 24884370 SMILES identifier | O=[Os](=O)(=O)=O InChI identifier | InChI=1/4O.Os/rO4Os/c1-5(2, 3)4 MDL number | MFCD00011150](../image_source/862ebade0273fa68736a48219a62417f.png)
CAS number | 20816-12-0 PubChem CID number | 30318 PubChem SID number | 24884370 SMILES identifier | O=[Os](=O)(=O)=O InChI identifier | InChI=1/4O.Os/rO4Os/c1-5(2, 3)4 MDL number | MFCD00011150
NFPA label
![NFPA label](../image_source/a6d1365ec45afabb82f420433f085e3e.png)
NFPA label
![NFPA health rating | 3 NFPA fire rating | 3 NFPA reactivity rating | 0](../image_source/68e49f8d3e94ed4c4f42aa2dc727a6c1.png)
NFPA health rating | 3 NFPA fire rating | 3 NFPA reactivity rating | 0
Safety properties
![flash point | -40 °C](../image_source/1bed49924fe3ca6c26321a30cc3011cd.png)
flash point | -40 °C
![DOT hazard class | 6.1 DOT numbers | 2471](../image_source/8f89390af5b05be8fe84dbe2275d50cc.png)
DOT hazard class | 6.1 DOT numbers | 2471
Toxicity properties
![lethal dosage | 162 mg/kg (oral dose for rats) short-term exposure limit | 0.006 mg/m^3](../image_source/17b403651bf62f2240b74f79d95fb560.png)
lethal dosage | 162 mg/kg (oral dose for rats) short-term exposure limit | 0.006 mg/m^3
![probable lethal dose for man | 30 mL (milliliters) long-term exposure limit | 0.002 mg/m^3 (over 8 hours) RTECS classes | drug | mutagen | reproductive effector | human data](../image_source/790546cb09bdb41f43de2859fe38b21f.png)
probable lethal dose for man | 30 mL (milliliters) long-term exposure limit | 0.002 mg/m^3 (over 8 hours) RTECS classes | drug | mutagen | reproductive effector | human data