Buy Oxytocin
PX1 Research supplies high-purity, USA-synthesized Oxytocin (acetate salt) specifically engineered for in vitro assays, receptor-binding studies, and preclinical neuroendocrine research. Every lot undergoes rigorous third-party analytical verification to guarantee structural identity, high purity, and low endotoxin levels for reliable experimental outcomes.
Quick answer
PX1 Research supplies high-purity, USA-synthesized Oxytocin (acetate salt) specifically engineered for in vitro assays, receptor-binding studies, and preclinical neuroendocrine research. Every lot undergoes rigorous third-party analytical verification to guarantee structural identity, high purity, and low endotoxin levels for reliable experimental outcomes.
Key takeaways
- Researchers seeking to buy [oxytocin](/research-peptides/oxytocin) for non-clinical laboratory evaluation require compounds manufactured under strict quality controls with batch-specific analytical verification.
- [Oxytocin](/research-peptides/oxytocin) is an endogenous mammalian nonapeptide (nine amino acids) characterized by a cyclic structure formed by a disulfide bridge between two cysteine residues.
- The primary cellular target of [Oxytocin](/research-peptides/oxytocin) is the Oxytocin Receptor (OXTR), a Class A Rhodopsin-like G-protein coupled receptor (GPCR).
- In modern preclinical investigation, [Oxytocin](/research-peptides/oxytocin) serves as a vital tool across multiple physiological and neurobiological paradigms.
Sourcing High-Purity Oxytocin for Laboratory Research
Researchers seeking to buy oxytocin for non-clinical laboratory evaluation require compounds manufactured under strict quality controls with batch-specific analytical verification. High-purity research-grade Oxytocin can be purchased directly from specialized USA suppliers like PX1 Research, ensuring that experimental workflows are supported by fully transparent documentation, lot-traceability, and consistent peptide sequence integrity.
In preclinical settings, subtle variations in peptide purity or the presence of trace synthesis byproducts can significantly skew bioassay data, binding kinetic measurements, and cell culture responses. Sourcing from a reliable USA manufacturer eliminates common supply-chain uncertainties, yielding lyophilized material prepared in GMP-compliant facilities that meet stringent standards for analytical research. Investigators can explore our full catalog of research compounds through the PX1 Research hub or navigate directly to order high-purity Oxytocin for upcoming experimental trials.
Biochemical Structure and Chemical Identity of Oxytocin
Oxytocin is an endogenous mammalian nonapeptide (nine amino acids) characterized by a cyclic structure formed by a disulfide bridge between two cysteine residues. Its primary amino acid sequence is CYIQNCPLG-NH2 (Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH2), featuring a C-terminal amidation that is essential for receptor binding affinity and biological stability. The disulfide bond between Cys1 and Cys6 creates a six-amino-acid ring structure paired with a tripeptide tail.
The molecular formula of Oxytocin free base is C43H66N12O12S2, yielding a precise molecular weight of approximately 1007.19 Da. In laboratory settings, Oxytocin is predominantly supplied as an acetate salt (Oxytocin acetate) to maintain solubility, stability, and crystalline integrity in lyophilized powder form. Understanding the distinct structural features of this peptide allows investigators to accurately calculate molar concentrations for electrophysiology, radioligand binding, and secondary messenger assay protocols.
Receptor Dynamics and Intracellular Signaling Mechanisms
The primary cellular target of Oxytocin is the Oxytocin Receptor (OXTR), a Class A Rhodopsin-like G-protein coupled receptor (GPCR). Binding of Oxytocin to OXTR predominantly activates the Gq/11 signaling pathway, stimulating phospholipase C-beta (PLCβ). This enzymatic cleavage converts phosphatidylinositol 4,5-bisphosphate (PIP2) into inositol 1,4,5-trisphosphate (IP3) and diacylglycerol (DAG). IP3 subsequently triggers rapid intracellular calcium ion release from the endoplasmic reticulum, while DAG activates protein kinase C (PKC).
Preclinical studies suggest that OXTR activation can also engage alternative signaling cascades depending on cell type and receptor density, including the MAPK/ERK pathway and the phosphoinositide 3-kinase (PI3K)/Akt pathway. Furthermore, due to significant structural homology among nonapeptide receptors, Oxytocin exhibits partial cross-reactivity with arginine vasopressin receptors—specifically V1a, V1b, and V2. In vitro assays often evaluate these cross-binding dynamics to determine concentration-dependent receptor selectivity and downstream transcriptional activity.
Preclinical Applications and Primary Research Models
In modern preclinical investigation, Oxytocin serves as a vital tool across multiple physiological and neurobiological paradigms. Researchers routinely utilize high-purity Oxytocin to map central nervous system circuit dynamics, smooth muscle contractile response mechanisms, and endocrine feedback loops. Key preclinical research areas include:
• Neuroendocrine Signaling Pathways: Investigating how central microinjections or tissue bath applications affect hypothalamic-pituitary-adrenal (HPA) axis responsiveness and stress-related neuropeptide expression. • Social Behavior & Rodent Models: Utilizing behavioral assays in prairie voles and mice to assess central OXTR activation patterns during pair bonding, maternal behavior, and social recognition protocols. • Smooth Muscle Kinetics: Evaluating isolated tissue strip contraction profiles (e.g., uterine or mammary myoepithelial preparations) to quantify receptor-mediated force generation and calcium channel influx. • Cardiovascular & Metabolic Regulation: Examining in vitro cardiomyocyte signaling, nitric oxide synthase activation, and peripheral vascular tone modulation under controlled oxidative conditions.
Comparative Analysis: Oxytocin and Related Class Nonapeptides
When designing receptor selectivity panels or structural-activity relationship (SAR) studies, researchers often evaluate Oxytocin alongside structurally analogous nonapeptides. Small sequence variations among these molecules drastically alter receptor subtype selectivity, metabolic stability, and signaling bias across target tissues.
For instance, comparing Oxytocin with arginine vasopressin highlights how substituting isoleucine at position 3 with phenylalanine, and leucine at position 8 with arginine, shifts high-affinity binding from the OXTR to the V1a/V2 receptors. Synthetic derivatives such as carbetocin analogs feature a modified thioether bridge and N-terminal modification, engineered specifically to resist enzymatic degradation by aminopeptidases in tissue culture systems. Researchers interested in broader neuroendocrine signaling pathways may also examine related regulatory peptides like Sermorelin when studying pituitary gene expression and peptide receptor crosstalk.
Analytical Quality Control: HPLC, MS, and Endotoxin Standards
To achieve reproducible laboratory results, research compounds must be free from synthesis impurities, residual TFA salts, truncations, and bacterial endotoxins. PX1 Research adheres to rigorous quality control standards, ensuring that every batch of Oxytocin undergoes multi-stage verification in an ISO 17025 accredited analytical facility prior to distribution.
Purity is quantitatively determined using High-Performance Liquid Chromatography (RP-HPLC), verifying peptide purity exceeding 98-99%. Mass Spectrometry (MS) electrospray analysis is simultaneously performed to confirm exact molecular weight and verify sequence integrity. Additionally, because bacterial lipopolysaccharides (endotoxins) can induce severe inflammatory responses in cell cultures and animal models—confounding experimental data—every lot is subjected to Limulus Amebocyte Lysate (LAL) testing to confirm endotoxin levels well below established scientific thresholds (<0.05 EU/mg).
Reconstitution, Handling, and Storage Protocols for Laboratory Use
Proper handling and storage protocols are required to preserve the structural stability of lyophilized Oxytocin and prevent premature degradation of its internal disulfide bond. Upon receipt, lyophilized vials should be stored in a freezer at -20°C or -80°C, protected from light and moisture.
When preparing solutions for in vitro or ex vivo assays, researchers should reconstitute the lyophilized powder using sterile bacteriostatic water, sterile normal saline, or appropriate laboratory buffer solutions (such as PBS or Tris-buffered saline). Reconstitution should involve gentle swirl agitation rather than vigorous vortexing to avoid mechanical shearing. Once reconstituted, solution aliquots should be prepared to prevent repeated freeze-thaw cycles, which can induce peptide aggregation or hydrolysis. Reconstituted liquid aliquots remain stable at 4°C for short-term evaluation or at -80°C for long-term storage in dedicated research freezers.
Why Sourcing USA-Manufactured Oxytocin Matters
The global landscape for research peptides varies significantly in manufacturing oversight and analytical standards. Sourcing USA-manufactured research peptides provides academic, biotechnology, and institutional laboratories with predictable quality standards, transparent lot tracking, and reliable compliance documentation.
PX1 Research synthesizes and packages peptides within advanced domestic facilities adhering to GMP-compliant guidelines. By maintaining domestic inventory and strict quality protocols, orders are fulfilled efficiently with same-day shipping (Monday through Friday) originating directly from distribution facilities in California and Arizona. This eliminates international customs delays, temperature fluctuation risks during extended transit, and batch-to-batch variability.
Institutional Procurement and Wholesale Research Supplies
Principal investigators, contract research organizations (CROs), and university department heads managing large-scale screening protocols require consistent supply chains capable of fulfilling high-volume demands without compromising quality metrics. PX1 Research supports institutional procurement by offering lot-reserved quantities and bulk ordering structures.
Research facilities looking to secure larger quantities of verified nonapeptides or establish recurring laboratory delivery schedules can submit inquiries through our dedicated wholesale lab account portal. Every wholesale shipment includes comprehensive safety data sheets (SDS), lot-specific Certificates of Analysis (COAs), and analytical spectrum reports necessary for internal quality audits and protocol approvals.
Frequently Asked Questions
What is the certified purity level of PX1 Research Oxytocin?
Every lot of Oxytocin supplied by PX1 Research is verified via reverse-phase HPLC and mass spectrometry to possess a purity level exceeding 98% (typically ≥99%), free of unreacted sequence fragments or heavy metal contaminants.
Is Oxytocin sold by PX1 Research suitable for human administration?
No. Oxytocin provided by PX1 Research is strictly designated for laboratory research use only (in vitro assays, chemical analysis, and non-clinical preclinical animal models). It is strictly not for human or veterinary medical use, clinical diagnosis, or therapeutic application.
What documentation accompanies research orders of Oxytocin?
Each batch includes a lot-specific Certificate of Analysis (COA) detailing RP-HPLC chromatograms, mass spectrometry mass-verification spectra, and quantitative endotoxin testing results.
How should lyophilized Oxytocin be stored upon delivery?
Lyophilized Oxytocin should be kept in a desiccated freezer environment at -20°C or -80°C upon arrival. Under these conditions, the dry peptide remains stable for extended laboratory storage periods.
Which solvents are recommended for reconstituting research-grade Oxytocin?
Oxytocin acetate is readily soluble in aqueous media. Common laboratory reconstitution solvents include sterile bacteriostatic water, phosphate-buffered saline (PBS), or sterile 0.9% sodium chloride solution.
How does Oxytocin differ from Vasopressin in preclinical assays?
While both are cyclic nonapeptides with internal disulfide bridges, Oxytocin features isoleucine at position 3 and leucine at position 8, directing selective binding toward the OXTR. Vasopressin contains phenylalanine and arginine at those positions, binding preferentially to V1a, V1b, and V2 receptors.
What is the endotoxin standard for PX1 Research peptides?
PX1 Research verifies that endotoxin levels in research peptides are strictly controlled using LAL testing, maintaining levels below 0.05 EU/mg to prevent endotoxin-induced interference in cell culture and tissue models.
What shipping options are available for laboratory orders?
Orders placed Monday through Friday ship same-day from domestic distribution hubs in California and Arizona, ensuring rapid transit times and minimal exposure to environmental fluctuations.
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All products are sold strictly for laboratory and research use only. Not for human or veterinary use, diagnosis, treatment or consumption. Statements have not been evaluated by the FDA.