Cellular & Immune Research

Oxytocin

Nonapeptide hormone

Also known as Oxytocin acetate, OXT.

The cyclic nonapeptide neurohormone, supplied as the acetate salt for receptor-binding, social-behaviour and smooth-muscle research.

Current lot: SN-OXT-2607
Purity: 99.28% by HPLC
Tested: Jul 9, 2026
Stocked in: United States, Canada

Synamino Sciences research vial with a silver cap on a teal background

Ships from

Vial size

$34.00

USD · 5 mg · In stock

Qty

Order by 2:00 PM PT for same-day dispatch from Reno, Nevada. 1–3 business days by USPS Priority and UPS. Free shipping over $150.00.

For laboratory research use only. Not for human or veterinary use.

About the compound

Oxytocin is one of the first peptide hormones ever sequenced and synthesised. It remains a core tool compound in neuroendocrinology, behavioural neuroscience and uterine smooth-muscle pharmacology.

Supplied as a lyophilized powder.

Studied inOxytocin receptor · Behavioural neuroscience · Smooth-muscle pharmacology

Certificate of analysis

The certificate for the lot currently shipping. Every vial in that lot carries the same lot number on its label.

Certificate of analysis

Oxytocin · 5 mg

Lot SN-OXT-2607 · tested Jul 9, 2026

99.28%

Purity by HPLC

Labeled: 5 mg
Measured: 5.1 mg
Panel: 6 passed · 2 reported
Laboratory: Independent ISO/IEC 17025 accredited laboratory

Assay	Method	Result	Outcome
Appearance	Visual	White lyophilized powder	Pass
Purity	HPLC · spec ≥ 98%	99.28%	Pass
Net peptide content	HPLC	5.1 mg	Reported
Identity	LC-MS	Confirmed	Pass
Heavy metals	ICP-MS	Not detected	Pass
Sterility	USP <71>	No growth	Pass
Endotoxin	LAL · USP <85>	< 0.05 EU/mL	Reported
Residual solvents	GC-HS	Within limits	Pass

Specification and storage

CAS number: 50-56-6
Molecular formula: C43H66N12O12S2
Molecular weight: 1007.2 g/mol
Residues: 9
Sequence: CYIQNCPLG-NH2 (Cys1–Cys6 disulfide)
Reference record: PubChem entry

Storage

Sealed lyophilized vials are stable at room temperature for short periods; store at 2–8 °C for routine use.
For long-term storage keep sealed vials at −20 °C, protected from light and moisture.
Reconstituted solutions should be refrigerated at 2–8 °C and used within the period defined by your laboratory's protocol.

Literature

Peer-reviewed publications on this compound. Provided for reference; they are not claims about this product.

01
Physiological Reviews · 2001
The oxytocin receptor system: structure, function, and regulation
Gimpl G, Fahrenholz F
02
Neuron · 2008
Oxytocin shapes the neural circuitry of trust and trust adaptation in humans
Baumgartner T, Heinrichs M, Vonlanthen A, et al.

Studied alongside

Kisspeptin-10
KISS1R agonist decapeptide
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Selank
Tuftsin analogue heptapeptide
from $36.00

Research notice

Oxytocin is supplied for in vitro laboratory research and analytical use by qualified professionals. It is not a medicine, supplement or cosmetic, has not been evaluated by any regulator, and is not for human or veterinary use. Published findings cited on this page are provided for reference and are not claims about this product.