Oxytocin Australia: Buy Oxytocin Online

Shop Oxytocin Peptide as a 10 mg Vial With Lot Data and Identity

Buy Oxytocin as a 10 mg vial for receptor pharmacology, tissue bath and behavioural model work. It is in stock in Australia, supplied by weight rather than international units, and every lot comes with a certificate.

What Is Oxytocin?

Oxytocin is a small hormone made in the brain, nine amino acids long, best known for triggering uterine contractions in labour and milk let-down during nursing, and widely studied for its role in social bonding. The oxytocin peptide in this vial is chemically the same molecule, assembled synthetically rather than purified from glands.

How oxytocin signals

Picture a six-residue loop closed by a sulphur bridge, with a short three-residue tail hanging off it. That compact shape slots into OXTR, a receptor that couples mainly to Gq. In smooth muscle the result is a calcium surge and contraction; in neurons it alters firing and the release of other transmitters. Release in the body is reflex driven. Stretch of the cervix and suckling at the nipple both send nerve signals to the hypothalamus, which releases more oxytocin, which strengthens the stimulus, one of the few positive feedback loops in physiology. Late in pregnancy, oestrogen sharply raises the number of receptors in the uterine wall, so the same amount of hormone has a much larger effect at term than in mid-gestation.

From voles to trust games

The behavioural story began with rodents. Prairie voles form lasting pair bonds while the closely related montane vole does not, and work through the 1990s by Thomas Insel, Sue Carter, Larry Young and others traced part of that difference to the brain regions carrying the receptor; blocking the receptor in female prairie voles prevented a partner preference from forming. In 2005 a Nature paper by Kosfeld and colleagues reported that intranasal oxytocin increased the money volunteers entrusted to a stranger in an investment game. That result made headlines, and later attempts to replicate it and similar human findings produced weaker and less consistent effects, a caution worth carrying into any behavioural design.

Our practical point is one many labs overlook. Because its structure sits so close to vasopressin, oxytocin at higher concentrations also activates the vasopressin V1a receptor. A tissue or behavioural response at generous concentrations may therefore be partly a vasopressin receptor effect. We recommend adding a selective OXTR antagonist arm, so the result can be pinned to the receptor the study is actually about, and keeping concentrations near the receptor's nanomolar range. Researchers comparing hypothalamic signalling systems often pair oxytocin with kisspeptin-10 for the reproductive axis.

Buy Oxytocin Online in Australia, du Vigneaud's Nonapeptide

Order our oxytocin and you receive a synthetic molecule identical to the natural hormone. Vincent du Vigneaud's group at Cornell determined its structure and synthesised it in 1953, the first peptide hormone made in a laboratory, work recognised by the 1955 Nobel Prize in Chemistry. In the body it is produced by the paraventricular and supraoptic nuclei of the hypothalamus and stored in the posterior pituitary.

Oxytocin differs from vasopressin at only two positions, 3 and 8, yet each acts on a separate receptor family, which has made the pair a classic model for structure and selectivity studies. Its receptor, OXTR, is expressed in the myometrium, mammary myoepithelial cells and several brain regions, which is why one reagent serves such different research groups. Labs use it to ask how one receptor shapes behaviour, stress signalling and smooth muscle activity across tissues. Shop it in our nootropic peptides range, where it is listed as a research reagent and not the pharmaceutical product used in clinics.

Oxytocin in Australia: Registered Hospital Medicines Versus a Research Vial

The research vial holds 10 mg of synthetic oxytocin as a dry white powder, weighed in milligrams and supplied without any solvent. That makes it a different object from the oxytocin most Australians have heard of. Among the peptides we stock, oxytocin is one of the few with a fully established pharmaceutical life here: it is a registered prescription medicine used in obstetric care, sold as ready-made injection solutions labelled in international units rather than as powder.

Is oxytocin available in Australia as a medicine?

Yes, but only through the medical system. As of October 2026 the TGA's product information repository carries current documents for Syntocinon, Viatocinon, Oxytocin APX and Oxytocin GH, all single-ingredient oxytocin products, plus Syntometrine, which pairs oxytocin with ergometrine maleate. The Poisons Standard (June 2026 instrument) lists oxytocin in Schedule 4, prescription only, with an Appendix G entry that exempts only extremely dilute preparations. Unlike the growth hormone peptides on this site, it carries no Appendix D possession control. Those registered products are clinical injections for hospital use, measured in units and formulated for patients, so they are not a practical source of a defined milligram quantity of peptide for receptor pharmacology or tissue bath work.

That gap is the reason oxytocin for sale as a lyophilised research reagent exists alongside the pharmacy versions. A lab that needs to buy oxytocin in Australia to make a molar stock from a weighed amount, with a mass spectrometry identity check tied to the lot, is better served by a powder vial than by ampoules made for the labour ward. We stock that 10 mg vial in Australia for in vitro research, and every sale is limited to adults aged 18 and over and excludes human or veterinary use. For acid reconstitution, the 0.6% acetic acid diluent suits oxytocin's preference for a mildly acidic solution.

Order Oxytocin Peptide for Sale as a 10 mg Vial and Plan How Far It Goes

Oxytocin is offered as a single 10 mg vial at $109.99, or about $11.00 per milligram. Because it is a potent OXTR agonist used at low concentrations in cell and tissue work, one vial often outlasts the period a reconstituted solution should be kept, so make up only what the coming weeks need and leave the rest sealed and frozen.

Order by weight, not by units. The vial is quantified in milligrams, so molar calculations start from 1007.2 g/mol rather than from international units. Buy the vials for a months-long series together so every one shares a lot and a certificate, and the single fill size keeps record keeping to one specification for the whole project. Oxytocin is sold only to adults aged 18 and over.

Buy Oxytocin With the Ring Closure, Purity and Lot Certificate Verified

For a cyclic peptide, the certificate has to confirm the correct oxidised form. The ring-closed molecule is 2 daltons lighter than its reduced, open-chain counterpart, and dimers formed by disulfide scrambling appear at roughly double the mass. Formulation studies also describe deamidation at the glutamine, the asparagine and the C-terminal glycinamide, each adding about 1 dalton. The tyrosine at position 2 provides the UV signal used to read the HPLC trace.

Shop with that in mind. A sound certificate shows a measured mass matching 1007.2 g/mol, one dominant HPLC peak and a purity value for that exact lot. Find yours in the COA library using the lot number on the label, and see the guide on how to read a COA if the terms are new.

Order Oxytocin Online for Delivery Near You and Keep It Cold

There is no need to look for a local supplier, even for research peptides in Newcastle. AminoBlend is an online-only peptide store with no shopfront or pickup point, shipping to every Australian address from local stock. Payment before 3pm on a business day means dispatch the same day, and delivery information lists transit times.

Oxytocin is most stable in slightly acidic solution, around pH 4.5, so some protocols reconstitute with acetic acid 0.6% instead of bacteriostatic water. Warm the vial to room temperature, add the diluent slowly down the glass and swirl. Adding 5 mL to the 10 mg vial gives 2 mg/mL, close to 2 mM at 1007.2 g/mol, and the peptide calculator handles other volumes.

Heat is the main enemy, so the sealed vial goes straight to -20 °C on arrival. Keep solutions at 2 to 8 °C, split into aliquots, and avoid neutral or basic buffers for long-term holding. Record the diluent and pH on each aliquot label, since stability depends on both.

Other Names for Oxytocin

Oxytocin is spelled ocytocin in several European languages and is abbreviated OT or OXT. Its one-letter sequence is CYIQNCPLG-NH2, and older literature calls it alpha-hypophamine. Its receptor is OXTR, a Gq-coupled receptor that activates phospholipase C, inositol trisphosphate and intracellular calcium release. Pharmacology texts group it with vasopressin as the neurohypophysial hormones. Every one of these names describes the cyclic nonapeptide with CAS 50-56-6.

Order Oxytocin or Kisspeptin for Your Hypothalamic Study

Oxytocin acts on its own receptor in the brain, uterus and mammary tissue, so choose it for social behaviour, stress-axis, myometrial and myoepithelial preparations. Kisspeptin-10 acts further up the hypothalamic chain, on KISS1R and the GnRH neurons, and is the tool for reproductive axis questions. Buy the two in one parcel when a study spans both systems. Oxytocin is ring-closed while kisspeptin-10 is linear, so their certificates emphasise different identity checks.

Shop Selank alongside oxytocin for stress-related behaviour designs, since this tuftsin analogue is studied in GABA-related models.