NovaPep

Buy Oxytocin Australia: Oxytocin 10mg Research Vial

$109.99AUD, GST included

In stock in Australia, batch certificate ready

Size: 10 mg vial

Certificate of analysis published for every batch
Third-party HPLC purity and MS identity testing
Dispatched same day before 3pm cut-off, tracked Australia-wide
Research use only, sold to adults aged 18 and over

Buy oxytocin online in Australia as a 10 mg research vial, tested for identity and purity on every lot. The oxytocin peptide we supply in Australia is a research-grade version of the nine-residue neurohypophysial hormone, best known for its roles in uterine contraction, milk let-down and social bonding research. The sequence Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH2 is joined into a ring by a disulfide bond linking its two cysteines. It serves as the reference agonist at the oxytocin receptor, OXTR, across social behaviour, stress-axis and smooth muscle studies. You can check the identity data yourself, C43H66N12O12S2, 1007.2 g/mol and CAS 50-56-6. It comes as a 10 mg lyophilised vial sent from local stock. HPLC measures the purity of every lot and mass spectrometry confirms its identity, and the certificate can be opened before checkout. Work out molar stocks using the peptide calculator. Add kisspeptin-10 to the same cart to cover another point on the hypothalamic map. No diluent comes with the powder, so include bacteriostatic water or a mildly acidic alternative, and store the unopened vial at -20 °C. Supplied as a research reagent rather than a pharmaceutical, to adults 18 and over only.

For laboratory research use only. Not for human or veterinary use. Not TGA approved. See the NovaPep research use policy.

What Is Oxytocin?

Oxytocin is a nine amino acid hormone produced in the brain. It is famous for prompting contractions of the uterus during labour and milk let-down while nursing, and researchers study it widely for its part in social bonding. The oxytocin peptide inside this vial is the same molecule chemically, built by synthesis instead of being extracted from glands. Buy Oxytocin online in Australia as a 10 mg research vial, with the lot certificate published before you order.

The oxytocin in this vial is a synthetic molecule that matches the natural hormone exactly. In 1953 Vincent du Vigneaud's team at Cornell worked out its structure and synthesised it, making it the first peptide hormone ever produced in a laboratory, and the achievement earned the 1955 Nobel Prize in Chemistry. Inside the body it is made by the paraventricular and supraoptic nuclei of the hypothalamus and held in the posterior pituitary.

How Oxytocin Signals Through OXTR

Imagine a loop of six residues sealed by a sulphur bridge, trailing a short three-residue tail. That compact form fits into OXTR, a receptor that mostly couples to Gq. Smooth muscle answers with a calcium surge and contraction, while neurons change their firing and the release of other transmitters. In the body, release is driven by reflexes. Cervical stretch and suckling at the nipple each send nerve signals up to the hypothalamus, which releases more oxytocin, which in turn intensifies the stimulus, making it one of the rare positive feedback loops in physiology. Toward the end of pregnancy, oestrogen steeply increases receptor numbers in the uterine wall, so a given amount of hormone has far more effect at term than midway through gestation.

Only positions 3 and 8 separate oxytocin from vasopressin, yet the two act through distinct receptor families, which has made them a textbook pair for research on structure and selectivity. OXTR is found in the myometrium, in mammary myoepithelial cells and across several brain regions, which explains why a single reagent serves such varied research groups. Labs apply it to explore how one receptor influences behaviour, stress signalling and smooth muscle activity in different tissues. It appears in our nootropic peptides range as a research reagent, distinct from the pharmaceutical product used in clinics.

Oxytocin Research: What Studies Have Looked At

Pair-Bonding Voles and Human Trust Studies

Rodents opened the behavioural chapter. Prairie voles build lasting pair bonds and the closely related montane vole does not, and during the 1990s Thomas Insel, Sue Carter, Larry Young and colleagues linked part of that contrast to the brain regions where the receptor sits. In female prairie voles, blocking the receptor stopped a partner preference from developing. Then in 2005 Kosfeld and co-workers reported in Nature that intranasal oxytocin raised the sum volunteers handed to a stranger in an investment game. The finding drew wide attention, yet later efforts to reproduce it and related human results gave smaller and patchier effects, a warning worth keeping in mind for any behavioural study. To run this kind of in vitro work, buy Oxytocin online in Australia from lots tested by HPLC and mass spectrometry.

Here is a practical issue that many labs miss. Oxytocin is structurally so similar to vasopressin that, at higher concentrations, it also switches on the vasopressin V1a receptor. A tissue or behavioural response seen at generous doses in the dish could therefore stem partly from vasopressin receptors. We suggest including a selective OXTR antagonist arm so the result can be tied to the receptor actually under study, and holding concentrations close to the receptor's nanomolar range. Teams comparing hypothalamic signalling systems frequently combine oxytocin with kisspeptin-10 as the reproductive axis tool.

Oxytocin as a Registered Medicine in Australia

Inside the research vial is 10 mg of synthetic oxytocin as dry white powder, weighed in milligrams and shipped with no solvent. That sets it apart from the oxytocin most Australians know about. Of all the peptides we carry, oxytocin is one of the few with a fully established pharmaceutical role here. It is a registered prescription medicine in obstetric care, and it is supplied as ready-to-use injection solutions labelled in international units and not as powder.

Can You Get Oxytocin in Australia as a Medicine

Yes, though only through the medical system. As of October 2026 the TGA's product information repository holds current documents for Syntocinon, Viatocinon, Oxytocin APX and Oxytocin GH, each a single-ingredient oxytocin product, together with Syntometrine, which combines oxytocin with ergometrine maleate. Under the Poisons Standard (June 2026 instrument) oxytocin is in Schedule 4, prescription only, and an Appendix G entry exempts only extremely dilute preparations. It has no Appendix D possession control, unlike the growth hormone peptides listed on this site. Those registered products are clinical injections for hospitals, dosed in units and formulated for patients, so they do not offer a practical way to obtain a defined milligram amount of peptide for receptor pharmacology or tissue bath studies.

Oxytocin Specifications

Product name	Oxytocin
Fill	10 mg vial
Sequence	Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH2, disulfide bridge between Cys1 and Cys6
Chain length	9 amino acids (six-residue ring plus three-residue tail)
Formula	C43H66N12O12S2
Molecular weight	1007.2 g/mol
CAS	50-56-6
Appearance	White lyophilised powder inside a sealed glass vial, quantified by mass in milligrams
Quality checks	HPLC measures purity and mass spectrometry confirms the oxidised, ring-closed form, with one certificate per lot
In the box	One 10 mg vial of oxytocin per unit, sent without diluent, which is purchased separately
Storage conditions	Sealed at -20 °C, kept from heat and light. Solutions at 2 to 8 °C, ideally at slightly acidic pH
Stock status	In stock
Intended use	In vitro laboratory research only

The 10 mg oxytocin vial is intended for receptor pharmacology, tissue bath experiments and behavioural models. Stock is held in Australia, the peptide is supplied by weight and not in international units, and a certificate accompanies each lot.

Ring Closure and Purity Checks

With a cyclic peptide, the certificate must prove the correct oxidised form is present. The closed-ring molecule weighs 2 daltons less than the reduced, open-chain version, and dimers created by disulfide scrambling show up at about twice the mass. Formulation research also reports deamidation at the glutamine, the asparagine and the C-terminal glycinamide, with each event adding roughly 1 dalton. Tyrosine at position 2 supplies the UV signal used to read the HPLC trace.

Keep this in mind when you review a lot. A reliable certificate lists a measured mass that agrees with 1007.2 g/mol, a single dominant HPLC peak and a purity figure for that specific lot. Look yours up in the COA library with the lot number on the label, and read our guide on how to read a COA if any of the terms are unfamiliar.

Handling and Storage of Oxytocin

Oxytocin holds up best in slightly acidic solution of about pH 4.5, which is why some protocols use acetic acid 0.6% in place of bacteriostatic water. Let the vial warm to room temperature, trickle the diluent down the glass and swirl gently. Putting 5 mL into the 10 mg vial makes 2 mg/mL, near 2 mM at 1007.2 g/mol, and the peptide calculator covers any other volume. When you buy Oxytocin online in Australia, orders paid by 3pm on a business day are dispatched the same afternoon.

Heat does the most damage, so move the sealed vial to -20 °C as soon as it arrives. Store solutions at 2 to 8 °C in aliquots, and steer clear of neutral or basic buffers for long-term storage. Write the diluent and pH on every aliquot label, because both affect stability.

Oxytocin Compared With Kisspeptin-10

Oxytocin works through its own receptor in brain, uterine and mammary tissue, making it the right pick for social behaviour, stress-axis, myometrial and myoepithelial preparations. Kisspeptin-10 works higher in the hypothalamic chain, at KISS1R and the GnRH neurons, and suits questions about the reproductive axis. Running both suits a project that covers the two systems. Because oxytocin is ring-closed and kisspeptin-10 is linear, their certificates focus on different identity checks.

For stress-related behaviour studies, Selank pairs well with oxytocin, as this tuftsin analogue is researched in GABA-related models.

Other Names for Oxytocin

Several European languages spell it ocytocin, and the usual abbreviations are OT and OXT. In one-letter code the sequence reads CYIQNCPLG-NH2, and older papers refer to alpha-hypophamine. OXTR, its receptor, is Gq-coupled and triggers phospholipase C, inositol trisphosphate and the release of calcium inside the cell. Pharmacology references place it with vasopressin among the neurohypophysial hormones. All of these names describe the same cyclic nonapeptide, CAS 50-56-6.

Buy Oxytocin Online in Australia

This is why oxytocin for sale as a lyophilised research reagent sits beside the pharmacy forms. A laboratory wanting to buy oxytocin in Australia to prepare a molar stock from a weighed quantity is better off with a powder vial than with ampoules intended for the labour ward. The vial also comes with a mass spectrometry identity check linked to the lot. NovaPep holds that 10 mg vial in Australia for in vitro research, every sale is restricted to adults aged 18 and over, and human or veterinary use is excluded. If you prefer acid reconstitution, the 0.6% acetic acid diluent matches oxytocin's liking for a mildly acidic solution.

We offer oxytocin as one 10 mg vial. As a potent OXTR agonist used at low concentrations in cell and tissue work, a single vial frequently lasts longer than a reconstituted solution should be kept. Prepare only what the next few weeks require and keep the remainder sealed and frozen.

Think in weight rather than units. The vial is measured in milligrams, so molar calculations begin from 1007.2 g/mol and not from international units. Purchase the vials for a series lasting several months at once so all of them share one lot and one certificate, and the single fill size means the whole project runs on one specification. Oxytocin is supplied only to adults aged 18 and over.

You do not need a local supplier, even if you are after research peptides in Newcastle. NovaPep operates purely online, with no shopfront or pickup point, and ships from local stock to any address in Australia. Pay before 3pm on a business day for same-day dispatch, and check delivery information for transit times.

Oxytocin at a Glance

Ring-shaped nonapeptide hormone

Oxytocin is a nine-residue peptide sealed by a disulfide bridge, and du Vigneaud first synthesised it in 1953.

Buy the 10 mg vial online

You get one sealed vial of lyophilised powder measured in milligrams. Diluent is sold separately, as bacteriostatic water or acetic acid 0.6%.

A tool for OXTR research

Used as the reference OXTR agonist in social behaviour, stress-axis and smooth muscle preparations, for laboratory work only.

Versus kisspeptin-10

Kisspeptin works at KISS1R upstream of GnRH. Choose oxytocin when the measured outcome is OXTR signalling.

Cold and mildly acidic

Keep the sealed vial in a -20 °C freezer. Hold solutions at 2 to 8 °C in aliquots, preferably near pH 4.5 rather than neutral.

Ring closure verified

Mass spectrometry confirms the oxidised form and HPLC measures purity, and every lot certificate is published.

Oxytocin FAQ

What is oxytocin and how does it work?

Oxytocin is a nine amino acid hormone made in the hypothalamus and stored in the posterior pituitary. A six residue ring sealed by a disulfide bridge fits the OXTR receptor, which mostly couples to Gq. Smooth muscle responds with a calcium surge and contraction, while neurons change their firing.

Can I buy oxytocin peptide near me?

Yes, online from any part of Australia. Put the 10 mg vial in your cart, and orders paid before 3pm on a business day leave local stock the same day. NovaPep has no shopfront or pickup counter and ships tracked parcels to all states and territories, so every lab receives the same certified lot.

Is a certificate of analysis provided with oxytocin?

Yes. Every lot is tested by HPLC for purity and by mass spectrometry to confirm the ring-closed 1007.2 g/mol form, and its certificate is posted in the COA library. Use the lot number printed on your vial to find the matching report.

Which should I buy, oxytocin or kisspeptin?

Buy oxytocin when the experiment measures OXTR signalling in smooth muscle, stress or behaviour models. Buy kisspeptin-10 when the question involves the reproductive axis upstream of GnRH. Because they work through different receptors, ordering the pair suits studies comparing both hypothalamic systems.

Is this oxytocin supplied in milligrams or units?

It is supplied in milligrams. Every vial holds 10 mg of oxytocin powder, and you should base concentrations on the molar mass of 1007.2 g/mol. Unit figures from pharmaceutical sources do not translate directly, so set mass or molar concentrations for your assays with the peptide calculator.

How do laboratories use oxytocin?

It acts as the reference agonist at the oxytocin receptor and is used to investigate receptor pharmacology, social behaviour models, stress signalling and smooth muscle contraction in tissue preparations. The vial is a research reagent for in vitro laboratory work only, not a medicine, and not for human or veterinary use.