Input interpretation
![arsenic trioxide](../image_source/d908bcd151beae6b604cdb32c1a5c4da.png)
arsenic trioxide
Chemical names and formulas
![formula | As_2O_3 name | arsenic trioxide IUPAC name | 2, 4, 5-trioxa-1, 3-diarsabicyclo[1.1.1]pentane alternate names | arsenic(III) oxide mass fractions | As (arsenic) 75.7% | O (oxygen) 24.3%](../image_source/9a425813b8e076eb2398ce8f5ec2f7b2.png)
formula | As_2O_3 name | arsenic trioxide IUPAC name | 2, 4, 5-trioxa-1, 3-diarsabicyclo[1.1.1]pentane alternate names | arsenic(III) oxide mass fractions | As (arsenic) 75.7% | O (oxygen) 24.3%
Lewis structure
![Draw the Lewis structure of arsenic trioxide. Start by drawing the overall structure of the molecule, ignoring potential double and triple bonds: Count the total valence electrons of the arsenic (n_As, val = 5) and oxygen (n_O, val = 6) atoms: 2 n_As, val + 3 n_O, val = 28 Calculate the number of electrons needed to completely fill the valence shells for arsenic (n_As, full = 8) and oxygen (n_O, full = 8): 2 n_As, full + 3 n_O, full = 40 Subtracting these two numbers shows that 40 - 28 = 12 bonding electrons are needed. Each bond has two electrons, so in addition to the 4 bonds already present in the diagram add 2 bonds. To minimize formal charge arsenic wants 3 bonds and oxygen wants 2 bonds. Identify the atoms that want additional bonds and the number of electrons remaining on each atom: Fill in the 2 bonds by pairing electrons between adjacent highlighted atoms: Answer: | |](../image_source/b11829fe8012710b8b165f44ad367a45.png)
Draw the Lewis structure of arsenic trioxide. Start by drawing the overall structure of the molecule, ignoring potential double and triple bonds: Count the total valence electrons of the arsenic (n_As, val = 5) and oxygen (n_O, val = 6) atoms: 2 n_As, val + 3 n_O, val = 28 Calculate the number of electrons needed to completely fill the valence shells for arsenic (n_As, full = 8) and oxygen (n_O, full = 8): 2 n_As, full + 3 n_O, full = 40 Subtracting these two numbers shows that 40 - 28 = 12 bonding electrons are needed. Each bond has two electrons, so in addition to the 4 bonds already present in the diagram add 2 bonds. To minimize formal charge arsenic wants 3 bonds and oxygen wants 2 bonds. Identify the atoms that want additional bonds and the number of electrons remaining on each atom: Fill in the 2 bonds by pairing electrons between adjacent highlighted atoms: Answer: | |
Basic properties
![molar mass | 197.84 g/mol phase | solid (at STP) melting point | 312 °C boiling point | 465 °C density | 4.15 g/cm^3](../image_source/36467f3677b2cfdf38c80491d29507a8.png)
molar mass | 197.84 g/mol phase | solid (at STP) melting point | 312 °C boiling point | 465 °C density | 4.15 g/cm^3
Units
Basic drug properties
![approval status | approved | investigational | small molecule drug categories | antineoplastic agent | homeopathic agent dosage forms | oral: tablet](../image_source/c3dbee8ea2070232b25d69b177fc0586.png)
approval status | approved | investigational | small molecule drug categories | antineoplastic agent | homeopathic agent dosage forms | oral: tablet
![brand names | arsenite | arsenolite | arsodent | claudelite | claudetite | trisenox](../image_source/e3645de84dcb91f9f2dcaa887723cc7e.png)
brand names | arsenite | arsenolite | arsodent | claudelite | claudetite | trisenox
Solid properties (at STP)
![density | 4.15 g/cm^3 vapor pressure | 2×10^-4 mmHg (at 25 °C)](../image_source/cd2110c5a5bba3ec1e74812412d9b6ac.png)
density | 4.15 g/cm^3 vapor pressure | 2×10^-4 mmHg (at 25 °C)
Units
Thermodynamic properties
![molar heat of vaporization | 125.1 kJ/mol specific heat of vaporization | 0.6323 kJ/g molar heat of fusion | 18.4 kJ/mol specific heat of fusion | 0.093 kJ/g (at STP)](../image_source/953618f05f6b3a0bfba71ceaffa734e7.png)
molar heat of vaporization | 125.1 kJ/mol specific heat of vaporization | 0.6323 kJ/g molar heat of fusion | 18.4 kJ/mol specific heat of fusion | 0.093 kJ/g (at STP)
Chemical identifiers
![CAS number | 1327-53-3 PubChem CID number | 261004 PubChem SID number | 24852110 SMILES identifier | O=[As]O[As]=O InChI identifier | InChI=1/As2O3/c3-1-5-2-4 InChI key | GOLCXWYRSKYTSP-UHFFFAOYAM RTECS number | CG3325000 MDL number | MFCD00003433](../image_source/58e1d3c698aa895f129734b4c245857a.png)
CAS number | 1327-53-3 PubChem CID number | 261004 PubChem SID number | 24852110 SMILES identifier | O=[As]O[As]=O InChI identifier | InChI=1/As2O3/c3-1-5-2-4 InChI key | GOLCXWYRSKYTSP-UHFFFAOYAM RTECS number | CG3325000 MDL number | MFCD00003433
NFPA label
![NFPA label](../image_source/529853a76ccce74aa2e5a4fe1e3db8a6.png)
NFPA label
![NFPA health rating | 3 NFPA fire rating | 0 NFPA reactivity rating | 0](../image_source/e6dd6b116b71869e613c6a80a601d52b.png)
NFPA health rating | 3 NFPA fire rating | 0 NFPA reactivity rating | 0
Toxicity properties
![RTECS classes | agricultural chemical and pesticide | tumorigen | drug | mutagen | reproductive effector | human data](../image_source/e1289e040dc3369a0a4447541f66e691.png)
RTECS classes | agricultural chemical and pesticide | tumorigen | drug | mutagen | reproductive effector | human data