Semax

Order Semax 10mg from Eternal Peptides, a trusted and reliable supplier of research-quality peptides in the US. Our high-purity Semax peptide is verified by leading labs with certificates of analysis available. Get competitive prices and enjoy secure, discreet shipping with dedicated 24/7 support. Semax is sold for research use only.

Semax Peptide Characteristics

Property	Details
Name	Semax (Heptapeptide ACTH(4-10) analogue)
Sequence	Met-Glu-His-Phe-Pro-Gly-Pro (MEHFPGP)
Molecular Formula	C₃₇H₅₁N₉O₁₀S
Molecular Weight	813.9 g/mol
PubChem CID	9811102
Product Form	Lyophilized powder in 20 mg vials
Purity	≥99%, verified via third-party laboratory analysis with lot-specific Certificates of Analysis (COA) available
Solubility	Highly soluble in sterile water, bacteriostatic water, or saline solution; recommended reconstitution at 1-2 mg/mL for optimal stability
Storage	Store lyophilized powder at -20°C; reconstituted solution stable at 36-46°F (2-8°C) for up to 14 days or -20°C for extended storage
Appearance	White to off-white lyophilized powder
pH Stability	Stable at physiological pH (6.5-7.5)

Note: Semax demonstrates exceptional stability compared to endogenous ACTH fragments due to its synthetic modifications. The peptide resists enzymatic degradation and maintains structural integrity across a broad pH range, making it suitable for various experimental protocols.

Handling & Storage Guidelines

Proper handling and storage of Semax is essential to maintain peptide integrity, purity, and experimental reproducibility throughout research protocols.

Store unopened vials at -20°C (-4°F) in a freezer, protected from light and moisture. Under these conditions, lyophilized Semax remains stable for 24-36 months. Once received, transfer vials immediately to frozen storage and avoid prolonged exposure to room temperature during handling.

Reconstitute Semax using sterile water, bacteriostatic water, or sterile saline solution to achieve the desired concentration, typically 1-2 mg/mL for optimal stability. For the best stability, purity, and consistent results across experimental sessions, get our proven bacteriostatic water with your Semax order.

Allow the lyophilized powder to reach room temperature before adding reconstitution solution, then gently swirl (never shake vigorously) to dissolve completely. Avoid introducing air bubbles or creating foam during reconstitution.

Once reconstituted, Semax should be stored at 2-8°C (36-46°F) for short-term use up to 14 days. For extended storage beyond two weeks, aliquot the solution into single-use portions in sterile cryovials and store at -20°C (-4°F) or -80°C (-112°F). This aliquoting strategy prevents repeated freeze-thaw cycles, which significantly degrade peptide integrity and reduce experimental consistency.

During use, handle Semax using appropriate personal protective equipment including gloves, lab coat, and eye protection. Work within institutional biosafety and chemical handling guidelines. Dispose of unused peptide solutions and materials according to institutional waste management protocols. Maintain proper documentation of peptide handling, storage conditions, and expiration tracking as part of good laboratory practices.

COA / Quality Assurance

Eternal Peptides provides comprehensive Certificates of Analysis (COAs) for every Semax lot, ensuring complete transparency and traceability for all research applications. Each COA delivers detailed analytical data essential for experimental reproducibility, regulatory compliance, and quality assurance documentation.

Every certificate includes:

• Identity verification: HPLC and mass spectrometry confirm molecular weight and amino acid sequence.
• Purity testing: HPLC quantifies target peptide vs impurities, typically showing ≥98% purity for Semax.
• Sterility screening: USP <71> sterility protocols verify absence of microbial contamination.
• Endotoxin analysis: LAL assay confirms endotoxin levels within research-grade limits (typically <1.0 EU/mg).
• Lot-specific guidance: Certificates include tailored storage recommendations based on test results.
• Third-Party Verification: Eternal Peptides partners with leading independent analytical laboratories for reliable 3rd-party test results that meet international analytical standards
• Accessibility and Traceability: All COAs are readily accessible through the Lab Tests page on the Eternal Peptides website.

Legal / Regulatory Disclaimer 

Semax is strictly for laboratory research purposes only and is not approved by the FDA or any regulatory authority for human consumption, veterinary use, clinical administration, therapeutic applications, or diagnostic procedures.

The safety and efficacy of Semax in humans have not been established through controlled clinical trials meeting regulatory standards. This product is intended exclusively for qualified researchers operating within institutional review board (IRB) approved protocols and appropriate biosafety frameworks.

Purchasers are solely responsible for ensuring compliance with all applicable federal, state, and local regulations governing research peptides, as well as institutional policies. Eternal Peptides does not condone, support, or provide guidance for any non-research applications of this compound.