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Oxytocin Acetate
Oxytocin Acetate
  1. Oxytocin Acetate
  2. Oxytocin Acetate

Oxytocin Acetate

Oxytocin, a cyclic nonapeptide hormone, supplied as the acetate salt
CAS 50-56-6C₄₃H₆₆N₁₂O₁₂S₂Approximately 1007.2 g/mol9 amino acidsCyclic peptideLyophilized powder

Price range: $45.00 through $396.00

Ships from lot OT10 · 10 mg vial · 99.62% purity · Freedom Diagnostics See the COA

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Ships from Austin, TexasUnited States only
Tested by an outside labNever in-house
Every lot publishedIncluding rejected lots
Same-day dispatchOn orders before 2pm ET
SKU: N/A Category:
BATCH
VERIFICATION
LOT NUMBER
OT10
10 mg vial
IDENTITY
Confirmed
CHROMATOGRAPHIC PURITY
99.62%
NET CONTENT
10.39 mg
Analytical characterization

Every result against its specification.

Lot OT10 · 10 mg vial · Freedom Diagnostics · reported 9 June 2026 . The bar shows where the reported result falls against Astramide’s published release criterion. The notch marks the criterion.
Within criterion Above criterion Not on this COA
Test
Method
Criterion
Result
Result vs criterion
Status
Identity
LC-MS
LC-MS match to the labelled compound
Confirmed
WITHIN SPEC
Chromatographic purity
HPLC-UV
at or above 98.0%
99.62%
95 at or above 98.0% 100
WITHIN SPEC
Net content
HPLC-UV
10.39 mg
80 120
REPORTED
Endotoxin
LAL, USP <85>
below the 0.05 EU/mL assay sensitivity
Pass, 2 of 2 at ≤0.05 EU/mL
WITHIN SPEC
Appearance
Visual
white lyophilized powder
White Lyophilized Powder
WITHIN SPEC
Values are reported per vial or bottle unless otherwise noted. Every figure here is taken from the batch Certificate of Analysis and nothing else.
Certificate of Analysis
Oxytocin Acetate · Lot OT10 · 10 mg vial · Lab No. 2606080458
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Quick reference

How to read this report

Same six keys on every Astramide product page. Only the values change.
1Lot numberMatch it to the number printed on your product label. If they differ, this report is not for your product.
2IdentityMass spectrometry confirms the molecule is the one on the label. It conforms or it does not. There is no partial result.
3Chromatographic purityThe share of the material that is the target peptide. A purity figure quoted without a method is not a purity figure.
4Net contentHow much compound is in each vial or bottle, as measured by the laboratory. A different question from purity.
5EndotoxinMeasured against a ceiling, not a floor. Sensitivity differs by laboratory, so results are not compared across labs.
6Laboratory, method, dateWho ran it, on what instrument, and when. A report with no named laboratory or no date is not a report.
Molecular profile

Oxytocin Acetate, in structural terms.

Oxytocin Acetate molecular structure
Sequence
Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH2 (CYIQNCPLG-NH2), disulfide bridge Cys1-Cys6
Molecular formula
C₄₃H₆₆N₁₂O₁₂S₂
Molecular weight
Approximately 1007.2 g/mol
CAS number
50-56-6
Peptide length
9 amino acids
Structure type
Cyclic peptide
Parent sequence
Oxytocin-neurophysin I precursor (OXT gene)
Primary molecular target
Oxytocin receptor (OXTR), a class A G protein-coupled receptor that couples mainly to Gq/11, phospholipase C and release of intracellular calcium.
Physical form
Lyophilized powder
PubChem CID
439302

Oxytocin is a nine-amino-acid peptide (Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH2) with a disulfide bridge between Cys1 and Cys6, which closes a six-residue ring, followed by a three-residue tail ending in glycinamide. It belongs to the oxytocin and vasopressin family of neurohypophysial peptides. It is supplied here as the acetate salt (CAS 6233-83-6, C45H70N12O14S2, about 1067.2 g/mol); the formula, weight and CAS fields on this page describe the peptide itself.

Research profile

Where Oxytocin Acetate appears in the literature.

Neuroendocrinology; Receptor Pharmacology; GPCR Signaling; Structural Biology; Peptide Chemistry
Research applications
  • Published studies have used oxytocin in:
  • OXTR cloning, expression and binding studies
  • Gq/11, phospholipase C and calcium signaling studies
  • Oxytocin and vasopressin receptor selectivity studies
  • OXTR structural biology
Experimental systems
  • Cell lines transfected with cloned human OXTR
  • Membrane preparations for radioligand binding
  • Purified oxytocin-OXTR-Gq complexes for cryo-electron microscopy
Specific assays
  • Receptor cDNA cloning and expression
  • Radioligand binding assays
  • Intracellular calcium measurement
  • Inositol phosphate accumulation assays
  • Cryo-electron microscopy
Measured endpoints
  • Binding affinity at OXTR
  • Intracellular calcium mobilization
  • Second-messenger accumulation
  • Ligand-receptor contact residues and divalent cation dependence
Pcs

Single Vial, 3-Pack, 6-Pack, Pack of 10
Mechanism and research context

What has been studied, and in what systems.

Oxytocin is a cyclic nonapeptide whose principal molecular target is the oxytocin receptor. The human receptor was cloned in 1992 and identified as a seven-transmembrane G protein-coupled receptor; when expressed in cultured cells it bound oxytocin and produced intracellular calcium responses (Kimura et al., 1992).

A comprehensive review of the receptor system described its coupling to Gq/11 and phospholipase C, its regulation, and its dependence on divalent cations and membrane cholesterol for high-affinity binding (Gimpl and Fahrenholz, 2001).

A cryo-electron microscopy structure of oxytocin bound to its receptor and Gq later described the ligand binding pocket and a molecular switch linked to the receptor's cation dependence (Meyerowitz et al., 2022). These studies place oxytocin in receptor pharmacology and structural biology research.

These are published research systems. They do not describe approved clinical applications, and they do not establish efficacy or safety in humans.

Cited literature

Kimura T et al., 1992. Structure and expression of a human oxytocin receptor. Nature. PMID 1313946. https://pubmed.ncbi.nlm.nih.gov/1313946/
Gimpl G, Fahrenholz F, 2001. The oxytocin receptor system: structure, function, and regulation. Physiol Rev. PMID 11274341. https://pubmed.ncbi.nlm.nih.gov/11274341/
Meyerowitz JG et al., 2022. The oxytocin signaling complex reveals a molecular switch for cation dependence. Nat Struct Mol Biol. PMID 35241813. https://pubmed.ncbi.nlm.nih.gov/35241813/

Evidence level
Oxytocin receptor pharmacology is well characterised in cloning, binding, cell-signaling and structural studies. Statements on this page describe experimental systems, not outcomes in humans.
Handling and storage
As supplied
Lyophilized powder in a sealed vial. Held in laboratory-rated freezers from arrival to shipment.
Storage
Store per the conditions printed on the vial label. Avoid heat, moisture and repeated temperature cycling.
Handling
For qualified professionals in controlled laboratory environments, following validated laboratory procedures.
Frequently asked questions

About this compound and its batch data.

What purity did this Oxytocin Acetate batch achieve?

Lot OT10 was analysed by Freedom Diagnostics and returned chromatographic purity of 99.62% by HPLC with UV detection coupled to mass spectrometry. Identity was confirmed by mass spectral match. The full certificate is published on this page, and every figure shown here is taken from it.

How much Oxytocin Acetate is in the vial?

The laboratory measured 10.39 mg against a 10 mg label claim. Net content is reported on a per-vial basis. Astramide publishes the measured figure rather than the label claim, whether it falls above or below.

Was this Oxytocin Acetate batch tested for endotoxins?

Yes. Endotoxin testing was performed using the Limulus Amebocyte Lysate assay in accordance with USP <85>, and this batch returned a pass on both replicates at 0.05 EU/mL sensitivity. The result appears on the certificate published on this page.

How should this material be stored for research use?

As supplied, the lyophilized powder should be held at -20°C and protected from light and moisture. Once reconstituted, store at 2-8°C and use within 14 to 30 days. Avoid repeated freeze-thaw cycles and follow the handling procedures appropriate to your laboratory.

What is the difference between research-grade and pharmaceutical-grade Oxytocin Acetate?

These are separate classifications. Research-grade material is supplied for laboratory research use only and is not intended for human or animal consumption. Pharmaceutical-grade is an FDA classification that applies to drugs manufactured for human use. Astramide supplies research-grade material only.

How can I verify this Oxytocin Acetate certificate independently?

The certificate was issued by Freedom Diagnostics under lot OT10, accession 2606080458. Quote that reference to the laboratory directly. The same document is published here in full, and is not summarised or reformatted by Astramide.

Research use only

This product is intended strictly for in-vitro laboratory research conducted by qualified professionals. It is not intended for human or animal consumption, clinical use, or therapeutic application. The statements on this page have not been reviewed by the FDA. These research peptides are not intended to diagnose, treat, cure, or prevent any disease. Research Use Only.

COA library Every lot we have tested Search by batch number. Past lots stay published. How we test The analytical panel What each method measures and the criterion each lot must meet. Open Lab Send us your peptides Any vendor. Same lab. Your own Certificate of Analysis.
Ships from Austin, TexasUPS Ground, about 3 business days
United States onlyFree shipping at $150 and over
Tracked on every orderTracking number emailed when it ships
Replacement or store creditOn approved claims. See refund policy.

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