Epithalon 20mg — Vial Spec, Reconstitution Math & COA

Overview of the Epithalon 20mg Research Format

A 20mg vial of Epithalon contains twenty milligrams of ultra-pure, lyophilized L-alanyl-L-alpha-glutamyl-L-alpha-aspartyl-glycine (Ala-Glu-Asp-Gly) peptide. This expanded fill size is primarily ordered by institutional research laboratories, contract research organizations (CROs), and high-throughput academic facilities conducting large-cohort rodent studies or parallel cell culture assays. Because Epithalon protocols in animal models often require repeated administration over multi-week schedules, the 20mg format minimizes vial-to-vial reconstitution variability and reduces per-milligram handling overhead.

When evaluating experimental supply needs, researchers should review product availability directly within the Epithalon catalog page or browse our complete inventory of all research peptides. PX1 Research provides high-purity research compounds manufactured under strict GMP-compliant conditions. Depending on current inventory cycles and specific lot runs, Epithalon may be stocked in standard 10mg vials or larger 20mg formats; laboratories requiring specialized fill sizes or bulk packaging for multi-center trials can establish dedicated fulfillments via our wholesale lab account portal.

Molecular Identity and Preclinical Mechanism of Action

Classified as a synthetic short-chain peptide bioregulator, Epithalon is a biomimetic tetrapeptide structurally modeled after epithalamin, a natural peptide extract isolated from the pineal gland. In preclinical models, bioregulators act as chromatin-modulating agents that interact with specific histone structures and gene promoter regions to regulate protein synthesis at the transcriptional level.

Primary research endpoints for Epithalon center on telomerase activation, telomere maintenance, and circadian rhythm stabilization. In vitro assays using human somatic cells demonstrate that exposure to Epithalon induces telomerase enzyme activity, resulting in the elongation of telomeric repeats and an extension of the Hayflick limit. In animal studies involving aging rodents, Epithalon administration has been observed to restore pineal melatonin secretion patterns, suppress spontaneous tumor development, and reduce biomarkers of oxidative stress in hypothalamic and hepatic tissues.

Reconstitution Mathematics for 20mg Lyophilized Vials

Accurate concentration calculations are essential when preparing high-yield 20mg Epithalon vials to ensure precise volumetric dosing across experimental groups. Reconstitution should always be performed using sterile, laboratory-grade diluents such as Bacteriostatic Water (0.9% benzyl alcohol) for multi-dose animal protocols or Sterile Normal Saline / PBS for sensitive cell culture media.

To achieve target concentrations, utilize the following volumetric ratios for a 20mg vial:

• 1.0 mL Diluent Addition: Yields a stock concentration of 20.0 mg/mL (20.0 µg/µL or 20,000 µg/mL). • 2.0 mL Diluent Addition: Yields a stock concentration of 10.0 mg/mL (10.0 µg/µL or 10,000 µg/mL). • 3.0 mL Diluent Addition: Yields a stock concentration of 6.67 mg/mL (6.67 µg/µL or 6,670 µg/mL).

For complex dilutions or custom concentrations required for specific micro-dosing protocols, research personnel should verify all liquid measurements using the automated PX1 reconstitution calculator prior to solvent introduction.

Aliquot Planning and Solution Stability in Preclinical Protocols

Because reconstituting a full 20mg vial produces a substantial volume of stock solution, improper storage can lead to peptide degradation through repeated freeze-thaw cycles or prolonged room-temperature exposure. Once the solvent is introduced down the glass wall of the vial and gently swirled (never shaken) until fully dissolved, the stock solution should immediately be aliquoted.

Working aliquots should be divided into sterile, low-binding polypropylene microcentrifuge tubes in single-use volumes (e.g., 100 µL to 500 µL). Aliquots intended for use within 14 to 28 days may be held at 2°C to 8°C if reconstituted with bacteriostatic water. For extended protocol timelines, individual aliquots must be flash-frozen and stored at -20°C or -80°C. Repeated thermal cycling causes peptide backbone cleavage and aggregation, drastically reducing assay reproducibility.

Storage Parameters: Lyophilized Powder vs. Reconstituted Peptide

Proper temperature control is paramount to maintaining the structural integrity of synthetic tetrapeptides. Dry, lyophilized Epithalon powder exhibits high thermal stability due to its low molecular weight (418.4 g/mol) and compact amino acid chain, but remains vulnerable to moisture ingress and light-induced oxidation.

• Lyophilized Powder (Unopened): Store at -20°C for up to 24 months, or at -80°C for extended archival storage up to 36 months. Protect from direct ambient light in a desiccated container. • Short-Term Powder Handling: Unopened vials can remain at room temperature (15°C to 25°C) for up to 5 days during transit without measurable loss of purity. • Reconstituted Liquid (Bacteriostatic Water): Store at 2°C to 8°C for a maximum of 28 days. Do not freeze reconstituted solutions containing benzyl alcohol multiple times. • Reconstituted Liquid (Sterile Water / Saline): Store at 2°C to 8°C for no more than 24 hours. Freezing at -80°C in single-use aliquots is mandatory for non-preserved aqueous solutions.

Analytical Quality Assurance: COA Issuance and HPLC/MS Verification

PX1 Research enforces rigorous analytical standards for every production batch. Each fill lot undergoes comprehensive physical and chemical validation conducted by independent, ISO 17025 accredited testing laboratories. Researchers can independently inspect batch credentials by accessing our public Certificate of Analysis repository.

Quality testing for Epithalon 20mg vials encompasses three core analytical assays:

1. High-Performance Liquid Chromatography (HPLC): Confirms peptide purity levels exceeding 98.0%. The chromatography report verifies the absence of residual synthesis reagents, truncated peptides, or deletion sequences. 2. Mass Spectrometry (MS): Electrospray ionization mass spectrometry (ESI-MS) confirms the exact molecular weight of 418.4 Da, matching the theoretical mass of Ala-Glu-Asp-Gly. 3. Bacterial Endotoxin Testing: Quantitative Chromogenic LAL assays ensure endotoxin levels remain strictly under 0.01 EU/mg, protecting cell cultures and animal subjects from inflammatory artifact reactions.

Comparative Analysis: Epithalon vs. Related Synthetic Peptide Bioregulators

When designing comparative longevity or gene expression assays, researchers frequently contrast Epithalon with other low-molecular-weight bioregulators and mitochondrial peptides. Understanding the distinct structural target profiles of these compounds helps optimize multi-peptide experimental frameworks.

For example, while Epithalon acts primarily as a pineal-derived bioregulator targeting telomerase and circadian genes, Thymalin serves as a thymus-mimicking bioregulator evaluated for immune cell differentiation and T-lymphocyte maturation in preclinical models. Similarly, Pinealon is a synthetic tripeptide (Glu-Asp-Arg) evaluated specifically for neuroprotective and central nervous system transcriptional pathways. Outside the classic bioregulator class, mitochondrial-derived peptides like MOTS-c target metabolic homeostasis and AMP-activated protein kinase (AMPK) activation rather than direct nuclear telomere recruitment. Additional foundational mechanistic data across these targets can be reviewed in the PX1 peptide research library.

Selecting the Optimal Fill Size: 10mg vs. 20mg Vials for High-Throughput Assays

Selecting between a 10mg and a 20mg Epithalon vial depends entirely on assay scale, sample size, and fluid handling equipment. While smaller 10mg vials are ideal for pilot studies or exploratory cell viability screens where reconstituted solution is consumed within days, 20mg vials offer significant procedural advantages for larger protocols.

High-throughput screening platforms and multi-arm animal cohorts benefit from 20mg fills because a single master mix can be prepared for the entire experimental group. Utilizing a single master reconstitution step eliminates inter-vial dissolution variance, standardizes pH across all treatment wells or injection syringes, and minimizes pipette transfer losses. Conversely, if a laboratory conducts sporadic assays separated by weeks, smaller 10mg units or multiple single-use aliquots are preferable to eliminate the risk of aqueous degradation over time.

Handling Guidelines for In Vitro and In Vivo Rodent Assays

To preserve the bioactivity of Epithalon in laboratory settings, strict aseptic techniques must be maintained during all preparation steps. Lyophilized vials should be brought to room temperature before reconstitution to prevent condensation from forming inside the vial cap upon opening.

When introducing solvents into the 20mg vial, direct the needle toward the glass container wall rather than spraying directly onto the peptide cake. Allow the solvent to soak the powder for 30 to 60 seconds before applying gentle rotational motion. Avoid vigorous vortexing or sonicating, as mechanical shear stress can disrupt peptide tertiary structure or cause micro-foaming. For sterile cell culture applications, pass the reconstituted solution through a 0.22 µm low protein-binding PES (polyethersulfone) syringe filter before adding it to culture media.