Identity established
Oxytocin
Oxt
Oxytocin is the cyclic nonapeptide hormone with a Cys1–Cys6 disulfide and a C-terminal glycinamide. Formula and mass match PubChem CID 439302 for the free base.
Record
- Research status
- Identity established
- Classification
- Cyclic peptide hormone
- One-letter sequence
- CYIQNCPLG
- Display sequence
- CYIQNCPLG-NH2 (disulfide Cys1–Cys6)
- Length
- 9 residues
- Molecular formula
- C43H66N12O12S2
- Molecular weight
- 1007.2
- CAS number
- 50-56-6
- PubChem CID
- 439302
- Sequence database
- Peptide Sequence Database
Naming
Salt and hydrate forms used in drug products can carry related registry numbers. This record is the free-base peptide.
What this record does not claim
Oxytocin is a long-established peptide hormone and an approved medicine. This index entry points at the chemical identity and does not discuss clinical use.
Categories
Sources
Last reviewed October 13, 2026. Send a correction