Semax 15mg — Vial Spec, Reconstitution Math & COA

Overview of the Semax 15mg Lyophilized Research Vial

A 15mg vial of Semax contains a highly purified, vacuum-sealed lyophilized cake containing exactly 15 milligrams of the synthetic heptapeptide sequence (Met-Glu-His-Phe-Pro-Gly-Pro). In experimental settings, this specific fill mass serves as an optimal mid-scale reserve for laboratories conducting series of biochemical, cell culture, or neurochemical assays without requiring frequent re-solubilization of smaller aliquots.

Primary investigators and academic laboratories select the 15mg vial size to balance stock longevity with experimental efficiency. When properly stored, the dry peptide mass remains stable for extended periods, enabling researchers to prepare specific stock solutions tailored to high-throughput screens or animal model dosing schedules. Understanding exact volumetric math and purity metrics is essential for maintaining strict methodological control.

Catalog Availability and Container Size Options at PX1 Research

At PX1 Research, we maintain strict inventory standards for high-demand peptides. While custom fill configurations such as 15mg vials are frequently analyzed in technical documentation, laboratory demand often favors scaled production runs. If the exact 15mg configuration is currently designated as custom or out of stock, researchers can access our standardized Semax 30mg formulation to maintain continuity in their research workflows.

Utilizing a larger 30mg vial often yields greater cost-efficiency per milligram for expanded study protocols, while smaller scale inquiries can reference our complete directory of all peptides for alternative research-grade compounds. Regardless of vial capacity, every lot undergoes identical analytical testing protocols to guarantee uncompromised purity and structural integrity.

Molecular Profile and Preclinical Mechanism of Action

Semax is an analog of the adrenocorticotropic hormone (ACTH) fragment ACTH(4-10), modified with a C-terminal Pro-Gly-Pro tripeptide sequence to significantly enhance enzymatic stability against aminopeptidases. Preclinical studies suggest that this structural alteration extends the biological half-life of the peptide in tissue assays compared to naturally occurring fragments.

In vitro data indicate that Semax modulates neurotrophic factor expression, specifically upregulating Brain-Derived Neurotrophic Factor (BDNF) and Nerve Growth Factor (NGF) mRNA levels in neuronal culture models. Furthermore, preclinical animal models demonstrate potential activity in modulating brain-derived neurotrophic pathways, vascular endothelial growth factors, and central neurotransmitter receptor binding (including dopaminergic and cholinergic systems) without exerting systemic hormonal activity associated with full-length ACTH.

Step-by-Step Reconstitution Math: 1mL, 2mL, and 3mL Diluent Volumes

Accurate concentration calculations are vital when reconstituting a 15mg peptide vial. Total concentration (C) is calculated using the formula C = Mass (m) / Volume (V). Depending on the assay requirements, choosing the correct diluent volume—typically Bacteriostatic Water (0.9% benzyl alcohol) or Sterile 0.9% Sodium Chloride—determines the final working concentration.

Below is the specific reconstitution breakdown for a 15mg Semax vial across standard laboratory diluent volumes:

1. Reconstitution with 1.0 mL Diluent: Yields a concentration of 15.0 mg/mL (15,000 mcg/mL). This high-density stock is ideal for micro-volume liquid handling systems or deep-freeze stock aliquoting. 2. Reconstitution with 2.0 mL Diluent: Yields a concentration of 7.5 mg/mL (7,500 mcg/mL). This moderate concentration facilitates accurate volumetric pipetting for standard cellular assays. 3. Reconstitution with 3.0 mL Diluent: Yields a concentration of 5.0 mg/mL (5,000 mcg/mL). This diluted format minimizes pipetting errors when dispensing low-dosage treatments in preclinical models.

For complex target concentrations or custom liquid volumes, researchers should utilize our interactive reconstitution calculator to quickly verify molarity and volumetric metrics prior to lab execution.

Aliquot Planning and Laboratory Handling Protocol

To preserve peptide integrity, repeated freeze-thaw cycles must be strictly avoided. Once the 15mg cake is dissolved, native peptide chains in liquid state become subject to hydrolytic degradation over time if left at room temperature. Laboratory protocols require immediate partitioning of the stock solution into single-use micro-aliquots using sterile, polypropylene cryovials.

When performing reconstitution, direct the diluent stream down the inner glass wall of the vial rather than jetting directly onto the lyophilized cake. Gently swirl the vial until complete dissolution is observed. Avoid vigorous vortexing or agitation, as shear forces can disrupt secondary peptide structures or induce aggregation in solution.

Comparative Analysis: Semax vs. Related Research Compounds

When evaluating neuro-active peptides for preclinical research, investigators frequently compare Semax to structurally or functionally related analogs. Understanding subtle differences in molecular structure and primary targets helps researchers select the exact compound required for their experimental design.

For instance, researchers comparing Semax to Selank note that while Semax derives from an ACTH fragment emphasizing BDNF expression and neuroprotective pathways, Selank is a synthetic analog of the immunomodulatory peptide Tuftsin, frequently investigated for its effects on enkephalin degradation and GABAergic modulation. Similarly, advanced derivatized variants such as N-Acetyl Semax Amidate exhibit increased lipophilicity and resistance to enzymatic cleavage in tissue cultures. Researchers seeking broad comparative datasets across novel signaling agents can explore our dedicated research library hub.

Analytical Quality Verification: Lot-Matched HPLC and MS Certification

PX1 Research enforces strict quality control standards for every batch of peptide produced. High-Performance Liquid Chromatography (HPLC) is conducted to confirm chemical purity, ensuring the product exceeds our mandatory 99% baseline standard. Concurrently, Mass Spectrometry (MS) verification confirms the exact molecular mass (MW 810.9 g/mol for native Semax), ensuring the absence of incomplete sequences or truncated synthesis byproducts.

Additionally, every lot undergoes rigorous kinetic chromogenic LAL assays to verify low endotoxin limits, preventing confounded cell culture results or non-specific inflammatory responses in preclinical models. Laboratory personnel can inspect, download, and archive official documentation directly via our verified COA portal.

Storage Conditions and Stability Guidelines

Maintaining correct environmental conditions is critical to preserving the biological activity of Semax 15mg vials. Lyophilized peptide powder should be stored in a dedicated freezer at -20°C for short-to-medium term storage, or at -80°C for long-term storage exceeding 12 months. Ensure vials are protected from light exposure and ambient humidity.

Following reconstitution, liquid stock solutions stored with a bacteriostatic preservative must be maintained under refrigeration at 2°C to 8°C and used within 28 days. Unpreserved aqueous stock solutions should be aliquoted immediately and stored at -20°C or -80°C, thawing individual vials only immediately prior to assay execution.

Institutional Sourcing and Bulk Procurement Protocols

Academic institutions, biotechnology organizations, and contract research organizations (CROs) requiring large-scale reagent supply can utilize our simplified institutional procurement channels. Standardized packaging and consistent fill weights enable seamless scale-up from preliminary bench research to expanded multi-phase studies.

For bulk orders, custom synthesis requests, or establishing institutional account privileges, researchers are encouraged to visit our wholesale portal. All shipments originate from our domestic US facilities located in California and Arizona, utilizing expedited logistics to preserve cold-chain integrity during transport.