Hormonal

Oxytocin

CAS 50-56-6

A cyclic 9-amino-acid neurohypophyseal peptide hormone (C43H66N12O12S2, CAS 50-56-6) with a disulfide bridge between Cys1 and Cys6. Synthesized in the supraoptic and paraventricular hypothalamic nuclei and released from the posterior pituitary; agonizes the oxytocin receptor (OXTR) to drive uterine contraction, milk ejection, and affiliative social behaviors. FDA-approved as Pitocin for labor augmentation and postpartum hemorrhage control. Widely studied as a research tool in social neuroscience and behavioral models.

For research purposes only. Not medical advice.

Compare vendor prices

Prices updated 5h ago

Vendor	Size	Price	$/mg ↑	Stock	Updated	Promo code	Buy
Ruo Bio	5 mg	$22.00	$4.40	IN STOCK	5h ago	—	BUY ↗
Southern Aminos	10 mg	$48.75	$4.88	IN STOCK	5h ago	—	BUY ↗
Welli Labs	10 mg	$54.99	$5.50	IN STOCK	5h ago	—	BUY ↗
EZ Peptides	10 mg	$58.00	$5.80	IN STOCK	5h ago	—	BUY ↗
Atomik Labz	10 ×5 mg	$306.00	$6.12	IN STOCK	5h ago	—	BUY ↗
Atomik Labz	5 mg	$34.00	$6.80	IN STOCK	5h ago	—	BUY ↗
Flawless Compounds	5 mg	$60.00	$12.00	IN STOCK	5h ago	—	BUY ↗
Glow Aminos	5 mg	$60.00	$12.00	IN STOCK	5h ago	—	BUY ↗
Modern Research Peptides	2 mg	$24.99	$12.50	IN STOCK	5h ago	—	BUY ↗
Peptira	2 mg	$34.00	$17.00	IN STOCK	5h ago	—	BUY ↗
ION Peptide	2 mg	$39.00	$19.50	IN STOCK	5h ago	—	BUY ↗
Ascension Peptides	2 mg	$49.99	$25.00	OUT	5h ago	—	BUY ↗
Modern Research Peptides	2 mgpowder	$24.99	—	OUT	1d ago	—	BUY ↗

Frequently asked questions

What is the cheapest place to buy Oxytocin?

Ruo Bio currently lists Oxytocin at $4.40/mg, the lowest indexed price across 11 tracked research peptide vendors.

How much does Oxytocin cost per mg?

Oxytocin ranges from $4.40/mg to $25.00/mg across 13 listings from 11 research peptide vendors, normalized to USD per milligram and refreshed daily.

How many vendors sell Oxytocin?

11 research peptide vendors currently list Oxytocin on PeptideScouter, with 10 in stock right now. We track 13 active listings across size and kit variants.

What is the CAS number for Oxytocin?

Oxytocin's CAS Registry Number is 50-56-6.