Oxytocin

Oxytocin is a cyclic nonapeptide with the sequence Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH₂ and an intramolecular disulfide bond between Cys1 and Cys6. Empirical formula C₄₃H₆₆N₁₂O₁₂S₂; MW 1007.19 Da (PubChem CID 439302).

Reconstitution. For in-vitro laboratory handling, dissolve with bacteriostatic water (0.9% benzyl alcohol). Compound is hygroscopic — handle in low-humidity conditions and re-cap immediately.

Stability profile. Lyophilized: stable at room temperature for up to 30 days sealed; long-term storage at -20 °C recommended. Reconstituted material: stable at 2–8 °C for up to 14 days.

Selected primary literature.
- Du Vigneaud V et al., 1953, J Am Chem Soc 75:4879 — original total synthesis and structural elucidation of oxytocin.

What remains uncharacterized: concentration-response relationships in any specific in-vitro model system are not implied here. The literature cited above describes molecular-level observations only.

For research use only. Not for human or animal consumption.

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