Oxygen

O₂ — CID 977

About Oxygen

Oxygen (PubChem CID 977) has the molecular formula O₂ and a molecular weight of 32.00 g/mol. Its IUPAC name is molecular oxygen.

Molecular Properties

• Compound Name: Oxygen
• PubChem CID: 977
• Molecular Formula: O₂
• Molecular Weight: 32.00 g/mol
• Exact Mass: 31.99
• IUPAC Name: molecular oxygen
• SMILES: O=O
• InChI: InChI=1S/O2/c1-2
• InChIKey: MYMOFIZGZYHOMD-UHFFFAOYSA-N
• XLogP: 0.07
• TPSA: 34.14 Ų
• H-Bond Acceptors: 2
• Heavy Atoms: 2
• Complexity: —

Lipinski Rule of Five

Passes Rule of Five

Rule	Value
MW ≤ 500	32.00
LogP ≤ 5	0.07
H-Bond Donors ≤ 5	0
H-Bond Acceptors ≤ 10	2

Frequently Asked Questions

What is the IUPAC name of Oxygen?

The IUPAC name of Oxygen (CID 977) is molecular oxygen.

What is the SMILES notation for Oxygen?

The canonical SMILES for Oxygen is O=O.

What is the InChIKey of Oxygen?

The InChIKey is MYMOFIZGZYHOMD-UHFFFAOYSA-N. The full InChI is InChI=1S/O2/c1-2.

What are the key properties of Oxygen?

Oxygen has a molecular weight of 32.00 g/mol, XLogP of 0.07, 0 rotatable bonds, 0 hydrogen bond donors, and 2 hydrogen bond acceptors.

Where does this data come from?

All data for Oxygen is sourced from PubChem (CID 977), the world's largest open chemistry database maintained by the National Library of Medicine (NIH).

Sources

• PubChem CID 977 — identifiers, structure, computed properties (public domain)
• DrugCentral drug card 4235 — approved-drug record (CC BY-SA 4.0)

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