Semax 10mg — Vial Spec, Reconstitution Math & COA

Vial Specification & Catalog Availability

A 10mg Semax vial provides a precise mass of synthetic, lyophilized peptide intended strictly for laboratory research use only. The 10mg format is frequently selected by institutional laboratories conducting pilot assays, receptor binding screens, or low-volume enzymatic degradation studies where large stock solutions are unnecessary or prone to degradation over extended testing windows.

To maintain optimal bulk manufacturing quality and offer superior unit cost efficiency for broad research programs, PX1 Research currently supplies Semax in a standardized 30mg configuration. Researchers seeking high-purity material for ongoing trials can review the Semax 30mg product page for current lot specifications. However, because experimental design often mandates working calculations based on a 10mg standard, this reference guide provides full mathematical models, dilution charts, and reconstitution protocols for the 10mg specification.

Researchers exploring our complete library of analytical compounds, reference standards, and biological analogs can browse our full catalog of all peptides to support institutional procurement requirements.

Chemical Identity & Molecular Structure

Semax is a synthetic heptapeptide analog derived from the N-terminal fragment (4-10) of adrenocorticotropic hormone (ACTH). Its primary amino acid sequence is Met-Glu-His-Phe-Pro-Gly-Pro, with a chemical formula of C37H51N9O10S and a molecular weight of approximately 810.9 g/mol. The incorporation of a Pro-Gly-Pro tripeptide sequence at the C-terminus significantly increases resistance to endopeptidase degradation compared to endogenous ACTH fragments.

In preclinical model systems, Semax is studied for its interactions with neurotrophic pathways, specifically its ability to modulate brain-derived neurotrophic factor (BDNF) expression and tropomyosin receptor kinase B (TrkB) signaling cascades. In vitro assays demonstrate that the peptide exhibits stability in neutral pH buffer solutions, though prolonged thermal exposure leads to methionine oxidation and hydrolytic peptide cleavage.

Reconstitution Math for 10mg Lyophilized Vials

Accurate reconstitution is vital for maintaining target concentrations across microplate assays, HPLC standard curves, and cell culture treatments. When reconstituting a 10mg vial of Semax, the total volume of diluent dictates the resulting mass-to-volume ratio.

Reconstituting a 10mg vial with 1.0 mL of sterile laboratory diluent yields a final working concentration of 10.0 mg/mL (equivalent to 10.0 µg/µL). Adding 2.0 mL of diluent produces a concentration of 5.0 mg/mL (5.0 µg/µL), while a 3.0 mL addition results in 3.33 mg/mL (3.33 µg/µL). For custom assay volumes or precise micro-molar calculations, researchers should utilize our interactive reconstitution calculator to verify laboratory volumetric math.

The table below outlines common diluent additions and their corresponding concentration metrics for a 10mg solid mass standard:

• 1.0 mL Diluent Addition: 10.0 mg/mL (10.0 µg/µL or 12.33 mM) • 2.0 mL Diluent Addition: 5.0 mg/mL (5.0 µg/µL or 6.17 mM) • 3.0 mL Diluent Addition: 3.33 mg/mL (3.33 µg/µL or 4.11 mM) • 5.0 mL Diluent Addition: 2.0 mg/mL (2.0 µg/µL or 2.47 mM)

Laboratory Diluent Selection & Dissolution Handling

The choice of reconstitution diluent depends entirely on the analytical downstream application. For long-term liquid stability and multi-entry vial access over a 30-day window, Bacteriostatic Water containing 0.9% benzyl alcohol is recommended to inhibit microbial growth. For cell culture experiments or sensitive enzyme assays where benzyl alcohol may cause cellular toxicity, sterile 0.9% Sodium Chloride (saline) or Phosphate-Buffered Saline (PBS, pH 7.4) should be selected.

To reconstitute, sanitize the rubber septum of the vial with a 70% isopropyl alcohol swab. Direct the liquid diluent along the glass wall of the vial rather than shooting it directly onto the lyophilized cake. Allow the cake to hydrate naturally for 2 to 3 minutes. Gently swirl the vial in a circular motion until completely dissolved. Never vortex or aggressively shake reconstituted peptide solutions, as mechanical shear forces can induce peptide aggregation and denature secondary peptide conformations.

Aliquot Planning & Freeze-Thaw Degradation Avoidance

Repeated freeze-thaw cycles subject dissolved peptides to physical stress, ice crystal formation, and localized pH shifts, leading to progressive peptide degradation and reduced assay reproducibility. Laboratories executing multi-week study timelines must implement an aliquot protocol immediately following primary reconstitution.

Once dissolved, divide the stock solution into single-use micro-centrifuge tubes (e.g., 50 µL to 200 µL per vial depending on daily protocol demands). Store working aliquots at -20°C or -80°C in frost-free freezers. Once an aliquot is thawed for assay preparation, any remaining unused volume should be stored at 2°C to 8°C and used within 48 to 72 hours, or properly discarded according to institutional biosafety guidelines.

Lot-Matched COA & Quality Assurance Testing

PX1 Research enforces rigorous quality control parameters across every manufacturing batch. Each lot undergoes comprehensive analytical verification by an independent, ISO 17025 accredited testing facility prior to release.

Chemical identity and structural purity are verified using High-Performance Liquid Chromatography (HPLC) and Electrospray Ionization Mass Spectrometry (ESI-MS), ensuring a minimum purity threshold of 99.0%. In addition, bacterial endotoxin testing is conducted via the Limulus Amebocyte Lysate (LAL) assay to guarantee endotoxin levels remain below institutional safety thresholds (<0.05 EU/mg). Institutional buyers can inspect or download lot-specific analytical documentation directly via our dedicated COA lookup portal.

Comparative Nootropic Peptide Benchmarking

In preclinical neurochemical literature, Semax is routinely evaluated alongside other regulatory and synthetic neuropeptides to characterize differential mechanisms of action. Understanding these comparative profiles assists researchers in selecting the appropriate reference compound for specific experimental models.

While Semax focuses primarily on BDNF mRNA expression and melanocortin receptor interaction, compounds such as Selank 30mg act predominantly through enkephalinase inhibition and GABAergic modulation. Laboratories comparing modified ACTH and Selank derivatives often examine structural variants like N-Acetyl Semax Amidate to evaluate how N-terminal acetylation and C-terminal amidation affect enzymatic stability and blood-brain barrier permeability in non-human primate and rodent tissue models. Comprehensive mechanistic breakdowns are detailed in our research library hub.

Selecting Sizing: 10mg vs. 30mg Workflow Efficiency

Determining whether to utilize a 10mg specification or a larger fill size like the standard 30mg vial depends on protocol duration, sample throughput, and reagent storage capabilities. The 10mg format is ideal for preliminary validation, assay optimization, or short-term micro-dosing exposure studies where reconstitution volumes are kept under 2 mL.

Conversely, high-throughput screening, long-term animal model administration, or broad analytical testing runs benefit significantly from the 30mg vial format. Utilizing larger fill sizes reduces per-milligram reagent costs, minimizes container-closure variability across experiment arms, and reduces packaging waste. Facilities establishing institutional contracts or bulk protocol pipelines can coordinate custom supply schedules through our wholesale lab account portal.

Storage Stability & Cold-Chain Logistics

Lyophilized Semax standard cake exhibits high physical stability when stored under controlled conditions. Unreconstituted vials should be preserved at -20°C for long-term storage (up to 24 months) or 2°C to 8°C for short-term benchtop holding (up to 90 days). Vials must be protected from direct light and moisture exposure.

All PX1 Research orders are fulfilled directly from our temperature-controlled USA facilities located in California and Arizona. Orders placed Monday through Friday before 3:00 PM EST receive same-day dispatch. Products are shipped in insulated packaging with thermal packs to preserve product integrity during transit, ensuring that researchers receive pristine, un-degraded material ready for immediate laboratory application.