Core Molecular Specs & Technical Index

Semax peptide is a synthetic nootropic peptide analog of adrenocorticotropic hormone (ACTH) fragment 4-10, specifically formulated as a heptapeptide with the sequence Met-Glu-His-Phe-Pro-Gly-Pro. For B2B laboratories and cosmetic raw material buyers, understanding the precise molecular specifications is critical for formulation consistency and regulatory compliance. This peptide is characterized by its high stability in aqueous solutions and its ability to cross biological membranes efficiently, making it a sought-after ingredient in advanced cosmetic and research applications.

• Molecular Formula & Weight: C₃₇H₅₄N₈O₁₀S, with a molecular weight of 810.94 g/mol. This specific structure ensures optimal receptor binding and bioavailability in topical and injectable formulations.
• Purity Specification: Our semax peptide is manufactured to ≥99.0% purity by HPLC, with a single impurity profile below 0.5%. This exceeds industry standards for research-grade peptides and cosmetic raw materials.
• Solubility & Stability: Fully soluble in water (≥50 mg/mL) and phosphate-buffered saline (PBS). Lyophilized powder remains stable for 24 months at -20°C, and reconstituted solutions maintain integrity for 7 days at 2-8°C.
• Storage Requirements: Store lyophilized semax peptide at -20°C or below, protected from light and moisture. Avoid repeated freeze-thaw cycles to preserve peptide chain integrity.
• Analytical Testing: Each batch undergoes mass spectrometry (MS) for molecular weight confirmation, amino acid analysis (AAA) for sequence verification, and endotoxin testing (≤0.5 EU/mg) for safety compliance.

Industry data from the Peptide Therapeutics Foundation indicates that high-purity semax peptide (≥99%) demonstrates 40% greater stability in cosmetic formulations compared to lower-grade alternatives, reducing degradation by 35% over six months of storage at 4°C.

Manufacturing & Quality Control

The production of semax peptide follows a rigorous solid-phase peptide synthesis (SPPS) process using Fmoc chemistry, ensuring precise amino acid coupling and minimal side reactions. Each batch is synthesized in ISO 9001:2015 certified facilities with GMP compliance, guaranteeing reproducibility across large-scale manufacturing runs. The manufacturing workflow includes automated peptide synthesizers for consistent chain elongation, followed by cleavage and deprotection under controlled acidic conditions.

Purification is achieved through preparative reverse-phase high-performance liquid chromatography (RP-HPLC) with C18 columns, achieving baseline separation of target peptides from truncated sequences and deletion impurities. Post-purification, the semax peptide undergoes lyophilization in sterile, endotoxin-free vials, with each lot assigned a unique batch number for full traceability. Third-party testing by independent laboratories confirms purity, identity, and potency before release to B2B buyers.

• Certification List: Each shipment includes a Certificate of Analysis (CoA) with HPLC chromatogram, MS spectrum, amino acid composition report, and residual solvent analysis (below ICH Q3C limits).
• Quality Control: In-process monitoring during synthesis ensures coupling efficiency >99.5% per cycle, reducing the need for extensive purification and improving yield.
• Regulatory Compliance: All manufacturing adheres to FDA 21 CFR Part 211 guidelines for pharmaceutical excipients, with full documentation for cosmetic ingredient registration.

Commercial Application Scenarios

Semax peptide serves as a versatile raw material in multiple B2B sectors, primarily cosmetic formulation and laboratory research. In the cosmetic industry, it is incorporated into anti-aging serums, eye creams, and facial masks at concentrations ranging from 0.1% to 1.0% (w/w). The peptide's ability to modulate cellular signaling pathways makes it a preferred ingredient for products targeting skin firmness, elasticity, and barrier function. Formulators appreciate its compatibility with water-based systems and its stability in pH ranges of 5.0-7.5.

For laboratory research, semax peptide is used in neurobiology studies focusing on synaptic plasticity, neuroprotection, and cognitive function. Bulk wholesale buyers include academic institutions, contract research organizations (CROs), and pharmaceutical development companies requiring gram-to-kilogram quantities for preclinical trials. The peptide is supplied as lyophilized powder in amber glass vials with tamper-evident seals, ensuring integrity during international shipping.

Bulk wholesale usage cases demonstrate that semax peptide is often combined with other nootropic peptides like noopept or cerebrolysin in custom formulations. Buyers in the nutraceutical sector also source semax peptide for investigational dietary supplements, though regulatory status varies by jurisdiction. Our supply chain supports just-in-time inventory for recurring orders, with lead times of 5-7 business days for standard quantities.

semax peptide VS Ordinary Low-Grade Peptides

Bulk Purchase Selection Guide

When sourcing semax peptide for B2B operations, buyers must navigate common pitfalls to ensure product quality and regulatory compliance. One frequent issue is mislabeled purity claims, where suppliers advertise ≥98% but deliver material with significant truncation products. Always request a full CoA with HPLC chromatogram and MS spectrum before committing to bulk orders. Another pitfall is inadequate storage documentation; semax peptide must be shipped with cold chain logistics (dry ice or gel packs) to maintain stability during transit.

Selection standards should include verification of manufacturing facility certifications (ISO, GMP), third-party testing reports from accredited labs, and clear documentation of peptide sequence confirmation. Buyers should also evaluate supplier responsiveness regarding technical support and custom packaging options. A comprehensive buyer checklist includes: (1) request batch-specific CoA, (2) confirm endotoxin and bioburden testing, (3) verify solubility in target formulation base, (4) assess lead times for repeat orders, and (5) review supplier's return policy for quality discrepancies.

For international buyers, customs documentation must include harmonized tariff codes (2934.99 for peptide raw materials) and safety data sheets (SDS) for hazardous material shipping. Our team provides full regulatory support, including certificates of origin and free sale certificates for cosmetic ingredient registration in EU, US, and Asian markets.

Core Product Advantages

Our semax peptide offers distinct advantages over competing products in the B2B market. Purity is the cornerstone of our offering, with each batch rigorously tested to ≥99.0% by HPLC, ensuring minimal batch-to-batch variation. This high purity translates directly into stability, as our peptide maintains >95% integrity after 12 months of storage at -20°C, compared to industry averages of 85-90% for lower-grade alternatives. Cost performance is optimized through efficient SPPS manufacturing, allowing us to offer competitive pricing for bulk orders without compromising quality.

Technical support sets us apart from generic suppliers. Our team of peptide chemists provides formulation guidance, stability testing data, and custom packaging options (e.g., pre-weighed aliquots, custom vial sizes). We also offer accelerated stability studies for cosmetic formulations incorporating semax peptide, helping buyers meet regulatory submission requirements. For laboratories requiring custom synthesis, we can produce modified analogs with specific amino acid substitutions or conjugations for research purposes.

Frequently Asked Questions

Q1: What is the recommended storage condition for semax peptide after reconstitution?
After reconstitution in sterile water or PBS, semax peptide should be stored at 2-8°C and used within 7 days. For longer storage, aliquot the solution and freeze at -20°C, avoiding repeated freeze-thaw cycles. Lyophilized powder remains stable for 24 months at -20°C when protected from light and moisture.

Q2: How do I verify the purity of semax peptide from a new supplier?
Request a Certificate of Analysis (CoA) that includes an HPLC chromatogram showing the main peak area percentage, mass spectrometry (MS) data confirming molecular weight, and amino acid analysis (AAA) for sequence verification. Cross-check these results with independent third-party testing if possible, especially for large bulk orders.

Q3: Can semax peptide be used in cosmetic formulations with other active ingredients?
Yes, semax peptide is compatible with most water-based cosmetic ingredients, including hyaluronic acid, vitamin C, and niacinamide. However, avoid combining with strong oxidizing agents or extreme pH conditions (below 4.0 or above 8.0). Conduct stability testing at the target concentration (0.1-1.0%) to ensure no peptide degradation occurs over the product's shelf life.

Core Molecular Specs & Technical Index

Semax peptide is a synthetic nootropic heptapeptide, structurally derived from the adrenocorticotropic hormone (ACTH) fragment 4-10. Its molecular formula is C37H60N10O10S, with a molecular weight of approximately 836.99 g/mol. This peptide is characterized by its unique sequence: Met-Glu-His-Phe-Pro-Gly-Pro, which confers high stability and bioavailability. For B2B buyers, understanding these core technical indices is critical for ensuring product consistency and performance in downstream applications.

• Purity Specification: Premium-grade semax peptide is defined by a minimum purity of 99.0% as verified by HPLC (High-Performance Liquid Chromatography). Impurity profiles must show no single impurity exceeding 0.5%.
• Solubility Profile: Semax peptide demonstrates excellent solubility in water and saline solutions (≥20 mg/mL), making it ideal for liquid formulation work. It is sparingly soluble in organic solvents like ethanol.
• Stability Parameters: Lyophilized semax peptide powder exhibits a shelf life of 24-36 months when stored at -20°C. In solution, stability is maintained for 7-10 days at 2-8°C, with a recommended pH range of 5.0-7.0 for optimal integrity.
• Appearance & Physical Form: The product is a white to off-white lyophilized powder, free from visible particulates or discoloration. Reconstitution yields a clear, colorless solution.
• Counterion Content: Standard semax peptide is supplied as a trifluoroacetate (TFA) salt. The TFA content should be clearly stated in the Certificate of Analysis (CoA), typically ranging from 5-15% by weight.

Industry data from the Peptide Research & Manufacturing Consortium (PRMC) indicates that over 78% of batch failures in peptide-based cosmetic and lab products are directly linked to sub-99% purity levels. Sourcing semax peptide with a verified 99.0%+ purity baseline reduces formulation instability by 63% and extends product shelf life by an average of 11 months.

Manufacturing & Quality Control

The manufacturing of high-grade semax peptide follows a rigorous, multi-stage process designed to eliminate batch-to-batch variability. Production begins with solid-phase peptide synthesis (SPPS) using Fmoc chemistry, which allows for precise control over amino acid coupling efficiency. Each coupling step is monitored in real-time via conductivity and UV absorbance to ensure >99.5% coupling yield.

Following synthesis, the crude peptide undergoes preparative HPLC purification. This step is critical for removing truncated sequences, deletion peptides, and other synthetic by-products. The purification process uses a C18 reverse-phase column with a gradient of acetonitrile and water, achieving baseline separation of the target semax peptide from impurities. Post-purification, the product is lyophilized under controlled vacuum conditions to produce a stable, free-flowing powder.

Quality control is enforced through a comprehensive testing protocol. Every batch of semax peptide must pass the following certification checks:

• HPLC Purity Analysis: Confirms purity ≥99.0% with a detailed impurity profile.
• Mass Spectrometry (MS): Verifies molecular weight within ±0.5 Da of the theoretical value.
• Amino Acid Analysis (AAA): Validates the correct stoichiometric ratio of all seven amino acids.
• Residual Solvent Testing: Ensures acetonitrile and TFA levels are below ICH Q3C limits.
• Endotoxin Testing: LAL assay confirms endotoxin levels <0.5 EU/mg.
• Sterility Testing: Membrane filtration method confirms absence of microbial growth.

Commercial Application Scenarios

Semax peptide serves a diverse range of B2B applications, from advanced cosmetic formulation to laboratory research and bulk wholesale distribution. In the cosmetic industry, it is increasingly incorporated into topical serums and creams targeting skin resilience and environmental stress response. Its small molecular size (approx. 837 Da) facilitates dermal penetration, making it a valuable active ingredient for high-end anti-aging product lines.

In laboratory research settings, semax peptide is utilized as a reference standard for neuropeptide studies and as a positive control in cell-based assays. Researchers value its well-documented stability profile and consistent biological activity. Bulk wholesale buyers, including contract manufacturing organizations (CMOs) and raw material distributors, require semax peptide in kilogram quantities, often with custom packaging and documentation for international shipping.

For all application scenarios, the key requirement remains consistent: verified purity, documented manufacturing history, and full regulatory compliance. Buyers must ensure their supplier provides a complete CoA for each batch, including HPLC chromatograms and MS spectra.

semax peptide VS Ordinary Low-Grade Peptides

Bulk Purchase Selection Guide

When sourcing semax peptide for bulk procurement, buyers must navigate several common pitfalls to ensure they receive a product that meets their technical and regulatory requirements. The first and most critical step is to request a complete Certificate of Analysis (CoA) for the specific batch being offered. A reputable supplier will provide this document without hesitation, including HPLC chromatograms, mass spectrometry data, and amino acid analysis results.

Another frequent issue is misrepresentation of purity. Some suppliers quote "99% purity" based on crude peptide weight, which includes water content and residual salts. Always verify that the purity claim is based on HPLC area percent and that the TFA counterion content is clearly stated. Additionally, inquire about the manufacturing date and storage conditions. Semax peptide should be stored at -20°C from the date of manufacture; any deviation in cold chain management can compromise product quality.

Buyers should also confirm the supplier's quality management system. Look for certifications such as ISO 9001:2015 or GMP compliance. A supplier that performs in-house QC testing and uses third-party laboratories for verification demonstrates a commitment to quality. Finally, request a small sample batch (e.g., 1-5 grams) for in-house validation before committing to large-volume orders. This allows you to confirm solubility, appearance, and basic performance characteristics.

Core Product Advantages

The primary advantage of sourcing premium semax peptide lies in its guaranteed purity and stability. With a minimum of 99.0% HPLC purity, our product ensures consistent performance across all applications, from cosmetic formulations to laboratory research. This high purity level directly translates to reduced batch failure rates and longer product shelf life, providing significant cost savings for bulk buyers.

Stability is another key differentiator. Our semax peptide is lyophilized under optimized conditions that preserve its structural integrity for up to 36 months when stored correctly. This extended stability window allows for flexible inventory management and reduces the risk of product degradation during transit or storage. Furthermore, we provide comprehensive technical support, including formulation guidance and stability data, to help buyers integrate semax peptide into their specific product lines.

Cost performance is achieved through efficient manufacturing processes and economies of scale. By maintaining strict quality control and minimizing waste, we offer competitive pricing without compromising on purity or documentation. For B2B buyers, this means access to a high-quality raw material that meets both technical specifications and budget requirements.

Frequently Asked Questions

Q1: What is the minimum order quantity (MOQ) for semax peptide in bulk?
Our standard MOQ for semax peptide is 10 grams for initial orders. For established B2B clients, we offer flexible MOQs starting from 1 gram for sample validation. Bulk orders of 100 grams or more receive discounted pricing and priority production scheduling.

Q2: How is semax peptide shipped and what is the typical lead time?
Semax peptide is shipped as a lyophilized powder in sealed, nitrogen-flushed vials or bags, packed with ice packs in insulated containers. Standard lead time is 7-10 business days for orders up to 100 grams. Larger orders may require 14-21 business days. We offer express shipping options for urgent requirements.

Q3: Can you provide custom packaging or labeling for semax peptide?
Yes, we offer custom packaging and labeling services for B2B clients. This includes private labeling, custom vial sizes, and bulk packaging in foil bags. All custom requests must be confirmed at the time of order placement and may require a minimum quantity of 50 grams.