Oxytocin 2mg — Vial Spec, Reconstitution Math & COA
A 2mg vial of oxytocin provides a calibrated quantity of high-purity nonapeptide optimized for small-scale in vitro assays, pilot receptor binding studies, and precise micro-volume aliquoting. Designed strictly for laboratory research environments, this unit size allows investigators to maintain fresh solution stability while minimizing peptide waste during acute experimental protocols.
Quick answer
A 2mg vial of oxytocin provides a calibrated quantity of high-purity nonapeptide optimized for small-scale in vitro assays, pilot receptor binding studies, and precise micro-volume aliquoting. Designed strictly for laboratory research environments, this unit size allows investigators to maintain fresh solution stability while minimizing peptide waste during acute experimental protocols.
Key takeaways
- A 2mg vial of [oxytocin](/research-peptides/oxytocin) contains 2,000 micrograms (mcg) of the synthetic cyclic nonapeptide (molecular formula C43H66N12O12S2, molecular weight approximately 1007.19 g/mol) in a lyophilized (freeze-dried) cake format.
- PX1 Research maintains a rigorous manufacturing standard across all neuroendocrine and signaling research compounds.
- Calculating precise working concentrations from a lyophilized 2mg (2,000 mcg) [oxytocin](/research-peptides/oxytocin) cake requires accurate volumetric measurement of the diluent added.
- To ensure complete peptide solubilization and maintain molecular integrity during benchtop preparation, laboratory personnel must utilize sterile, research-grade diluents.
Direct Specification: What Does an Oxytocin 2mg Vial Contain?
A 2mg vial of oxytocin contains 2,000 micrograms (mcg) of the synthetic cyclic nonapeptide (molecular formula C43H66N12O12S2, molecular weight approximately 1007.19 g/mol) in a lyophilized (freeze-dried) cake format. The formulation is engineered for high solubility in aqueous buffer systems, yielding a clear, colorless solution upon proper reconstitution. Laboratory investigators typically select the 2mg fill size when conducting short-duration pilot studies, cell-culture exposure assays, or specialized binding affinity screens where minimizing solution storage time post-reconstitution is critical.
Because peptide degradation accelerates once brought into liquid phase, the 2mg format serves as an efficient working unit for research teams running single-day or limited microplate assays. Each vial is sealed under an inert nitrogen headspace in a USP Type I borosilicate glass vial with a fluoropolymer-coated chlorobutyl rubber stopper, preventing oxidation and atmospheric moisture contamination during cold storage.
Catalog Availability and Sourcing Options at PX1 Research
PX1 Research maintains a rigorous manufacturing standard across all neuroendocrine and signaling research compounds. While small-vial configurations such as 2mg are manufactured for specific low-volume project runs, primary inventory cataloging frequently centers on larger master formats. Investigators seeking high-throughput or ongoing multi-plate trial volumes often utilize our standard stock format, oxytocin 10mg, which provides greater cost efficiency for large-scale laboratory workflows.
If your specific trial parameters demand micro-scale batch runs or custom fill volumes, you can review our full line of synthetic peptides via our complete catalog of all peptides. Regardless of fill size—whether 2mg, 5mg, or 10mg—PX1 Research applies identical analytical quality controls, including HPLC purity verification, mass spectrometry sequence confirming, and endotoxin screening on every batch produced in our ISO 17025 compliant facilities.
Reconstitution Mathematics for a 2mg Oxytocin Vial
Calculating precise working concentrations from a lyophilized 2mg (2,000 mcg) oxytocin cake requires accurate volumetric measurement of the diluent added. The baseline mathematical relationship relies on the formula: Concentration = Mass / Volume. Depending on the sensitivity of the downstream analytical equipment or the target delivery system in microfluidic assays, researchers adjust diluent volume accordingly.
Adding 1.0 mL of reconstituting diluent to a 2mg vial yields a final concentration of 2.0 mg/mL (2,000 mcg/mL or 2.0 mcg/µL). Adding 2.0 mL yields 1.0 mg/mL (1,000 mcg/mL or 1.0 mcg/µL). Adding 3.0 mL yields approximately 0.667 mg/mL (666.7 mcg/mL or 0.667 mcg/µL). For rapid benchtop calculations across varying vial sizes and diluent volumes, research personnel can utilize our interactive reconstitution calculator.
Bench Protocol: Diluent Selection and Dissolution Steps
To ensure complete peptide solubilization and maintain molecular integrity during benchtop preparation, laboratory personnel must utilize sterile, research-grade diluents. Common choices include Sterile Water for Injection (SWFI), Bacteriostatic Water (containing 0.9% benzyl alcohol as a preservative for extended multi-use storage at 2–8°C), or phosphate-buffered saline (PBS, pH 7.4) when cell culture compatibility is required.
The standard bench procedure involves equalizing vial temperature to ambient room temperature before handling to prevent condensation on the lyophilized cake. Using a sterile syringe, draw the predetermined volume of diluent and slowly direct the stream against the glass inner wall of the vial rather than shooting directly onto the peptide cake. Gently swirl the vial in a circular motion until the solid cake fully dissolves into a clear liquid. Vigorous shaking or vortexing must be avoided, as mechanical shear stress can disrupt the native disulfide bridge structure of the oxytocin molecule, leading to aggregation or functional loss.
Aliquot Planning and Long-Term Storage Parameters
Lyophilized oxytocin vials remain stable at -20°C to -80°C for up to 24 months when protected from light and moisture. However, once reconstituted, aqueous peptide solutions become subject to hydrolysis, oxidation, and enzymatic degradation. To prevent concentration loss over extended experimental schedules, liquid working solutions should be divided into single-use micro-aliquots using polypropylene microcentrifuge tubes immediately following dissolution.
For short-term working bench stocks (1 to 7 days), reconstituted oxytocin preserved with 0.9% benzyl alcohol may be maintained at 2°C to 8°C. For long-term preservation of reconstituted material without antimicrobial preservatives, single-use aliquoting and sub-zero storage at -80°C is required. Researchers must avoid repeated freeze-thaw cycles, as phase transitions induce structural stress on the cyclic peptide ring, causing baseline potency shifts in quantitative assays.
Analytical Quality Control: Deciphering the Lot-Matched COA
Every batch of oxytocin manufactured for PX1 Research undergoes stringent third-party testing to guarantee chemical identity, purity, and safety for demanding bench applications. Each shipment includes access to a lot-matched Certificate of Analysis (COA), which documents analytical findings derived from High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS).
To review analytical documentation or download verified reports for your current lot, visit our centralized COA lookup portal. Key analytical metrics reported on an oxytocin COA include purity level (guaranteed ≥98.0% by HPLC area under the curve), correct molecular mass identification via electrospray ionization mass spectrometry (ESI-MS showing M+H+ at 1008.2 ± 0.5 Da), net peptide content quantification, and Endotoxin level verification via Limulus Amebocyte Lysate (LAL) assay (typically <0.05 EU/mg).
Comparative Analysis: Selecting the Appropriate Fill Size (2mg vs 10mg)
Choosing between a 2mg vial and a larger format depends primarily on the experimental scale, liquid stability constraints, and overall assay design. The 2mg fill size represents an optimal selection for acute, single-day assays, pilot receptor binding runs, or institutions evaluating baseline reagent compatibility. Because a smaller reconstituting volume is used, researchers avoid leaving reconstituted liquid stored in refrigeration for weeks, eliminating risks associated with ambient degradation.
Conversely, research facilities executing high-throughput screens or multi-animal rodent neuroendocrine trials benefit significantly from larger fill sizes. Utilizing an oxytocin 10mg vial reduces per-milligram reagent acquisition costs and ensures single-lot uniformity across expansive experimental blocks. For extensive projects, consult our wholesale portal to discuss continuous supply pipelines and custom volumetric packaging.
Mechanistic Overview: Oxytocin in Preclinical Neuroendocrine Models
Oxytocin is a classic neurohypophysial hormone synthesized in the magnocellular neurosecretory cells of the paraventricular and supraoptic nuclei of the hypothalamus. Structurally characterized by a 9-amino acid sequence featuring an internal disulfide bond between Cysteine-1 and Cysteine-6, the compound binds specifically to the G-protein coupled Oxytocin Receptor (OXTR). Preclinical models demonstrate that OXTR activation triggers Gq/11 phosphoinositide hydrolysis, driving intracellular calcium mobilization and downstream protein kinase C (PKC) signaling cascades.
In vitro models utilize oxytocin to investigate receptor internalization kinetics, cross-talk with adjacent GPCR pathways, and modulation of cellular electrophysiology in neuronal tissue cultures. In animal models, preclinical literature details oxytocin's role in central autonomic regulation, social recognition paradigms, stress response modulation via the hypothalamic-pituitary-adrenal (HPA) axis, and peripheral smooth muscle contractility. All such evaluations remain strictly restricted to laboratory models to characterize basic signal transduction mechanisms.
Comparative Peptide Profiling in Central & Peripheral Signaling
When evaluating neuroendocrine signaling pathways, researchers frequently compare oxytocin against structurally related nonapeptides and signal-modulating compounds. Its most direct structural counterpart, arginine vasopressin, differs by only two amino acids (position 3 and position 8), yet engages distinct V1A, V1B, and V2 receptor subtypes. Examining cross-reactivity and binding selectivity between oxytocin and vasopressin derivatives provides key insights into evolutionary receptor divergence.
In broader physiological and cellular repair research, investigators also benchmark central signal peptides against systemic tissue-modulating compounds such as BPC-157 or metabolic regulatory agents studied in our extended research library. Understanding these comparative chemical signatures allows laboratories to isolate pathway-specific actions without confounding receptor cross-activation.
Procurement, Institutional Supply, and PX1 Research Standards
PX1 Research operates as a trusted USA-based supplier of high-purity research compounds for academic, biotechnology, and institutional laboratories. All peptide synthesis takes place in GMP-compliant, ISO 17025 certified facilities, ensuring strict batch-to-batch consistency and elimination of unwanted organic impurities or heavy metal residues.
Orders placed Monday through Friday ship same-day directly from our primary distribution hubs in California and Arizona. Every package is dispatched with temperature-controlled protective packaging to maintain peptide integrity during transit. For dedicated institutional support, custom manufacturing, or high-volume orders, explore our options via the wholesale account registry or browse our entire product line across all peptides.
Frequently Asked Questions
What is the concentration of a 2mg oxytocin vial reconstituted with 2mL of water?
Reconstituting a 2mg (2,000 mcg) oxytocin vial with 2.0 mL of diluent yields a final working concentration of 1.0 mg/mL (1,000 mcg/mL or 1.0 mcg per microliter).
Does PX1 Research standardly carry oxytocin 2mg vials in stock?
PX1 Research primarily maintains standard inventory in 10mg vial sizes to optimize unit economics for laboratory clients. Small sizes like 2mg are produced for specific pilot batches. Check our catalog or contact sales for current stock status.
How should lyophilized oxytocin 2mg be stored upon delivery?
Lyophilized oxytocin should be stored in a freezer at -20°C to -80°C, kept away from light exposure. Under these conditions, the dry peptide cake maintains stability for up to 24 months.
Which diluent is recommended for reconstituting oxytocin for laboratory assays?
Sterile Water for Injection (SWFI) or Phosphate-Buffered Saline (PBS, pH 7.4) is recommended for single-use assays. Bacteriostatic Water containing 0.9% benzyl alcohol is preferred if the reconstituted solution will be stored at 2–8°C for multi-day use.
Where can I view the Certificate of Analysis for my oxytocin batch?
You can view and download lot-matched HPLC and Mass Spectrometry documentation directly on our COA lookup page using the batch number printed on your vial.
Can reconstituted oxytocin undergo multiple freeze-thaw cycles?
No. Repeated freeze-thaw cycles cause physical stress that can disrupt the cyclic disulfide structure of oxytocin, leading to peptide aggregation and loss of activity. Aliquoting into single-use micro-tubes prior to freezing is strongly recommended.
What is the difference between purchasing oxytocin 2mg versus oxytocin 10mg?
The 2mg vial is optimized for short-term, small-scale pilot studies where long liquid storage is undesirable. The 10mg vial is designed for high-throughput screening and larger experimental blocks, offering a lower cost per milligram.
Are PX1 Research oxytocin lots tested for bacterial endotoxins?
Yes. Every batch undergoes Limulus Amebocyte Lysate (LAL) testing to confirm endotoxin levels remain below strictly defined research thresholds (<0.05 EU/mg).
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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.