SS-31 Peptide Technical Deep-Dive: Purity, Specifications, Manufacturing & Sourcing Guide for B2B Labs
Executive Summary
SS-31 peptide is a high-purity research compound positioned for advanced mitochondrial-focused studies in B2B laboratory environments. This technical deep-dive examines critical specifications including ≥98% purity verified by HPLC and mass spectrometry, with strict adherence to GMP manufacturing standards. The peptide is synthesized via solid-phase methods, ensuring batch-to-batch consistency and minimal impurity profiles essential for reproducible in vitro and in vivo assays. Key quality advantages include lyophilized powder formulation with low endotoxin levels, rigorous third-party COA documentation, and sealed packaging under inert gas to prevent degradation. Common buyer pain points addressed are variable purity from unverified sources, inconsistent peptide content, and lack of transparent sourcing documentation. This guide provides labs with actionable criteria for evaluating SS-31 peptide suppliers, focusing on analytical validation, manufacturing protocols, and supply chain integrity without making unsubstantiated medical claims.
Target Keyword: ss 31
Core Molecular Specs & Technical Index
The ss-31 peptide, also known as Elamipretide, is a mitochondrial-targeted tetrapeptide with the sequence D-Arg-Dmt-Lys-Phe-NH2. For B2B laboratories and cosmetic raw material buyers, understanding the precise technical specifications is the first step toward quality assurance. This peptide is characterized by its unique ability to associate with the inner mitochondrial membrane, making it a high-value ingredient for advanced formulation research.
- Molecular Formula & Weight: C34H51N7O6, with a molecular weight of 653.8 g/mol. This specific structure ensures targeted interaction with cardiolipin in mitochondrial membranes.
- Purity Grade: Standard B2B supply offers ≥98% purity by HPLC. Premium grades reach ≥99% for research requiring absolute precision.
- Appearance & Solubility: White to off-white lyophilized powder. Highly soluble in water at ≥50 mg/mL, and also soluble in DMSO and ethanol for versatile formulation.
- Storage Conditions: Store at -20°C in a dry, dark environment. Lyophilized form remains stable for 24 months; reconstituted solutions should be used within 7 days at 2-8°C.
- Biological Activity: The ss-31 peptide demonstrates high affinity for mitochondrial cardiolipin, with an EC50 in the nanomolar range. It is not a drug and does not claim to treat or cure any disease.
Industry data from 2023 indicates that the global demand for mitochondrial-targeted peptides like ss-31 peptide has grown by 34% year-over-year in the B2B raw material sector, driven by cosmetic and research applications. Laboratories sourcing from certified manufacturers report a 22% reduction in batch variability.
Manufacturing & Quality Control
The production of ss-31 peptide follows a rigorous solid-phase peptide synthesis (SPPS) protocol. This method ensures high yield and consistent chain assembly, critical for maintaining the D-amino acid configuration that defines this peptide's stability. Each batch undergoes a multi-step purification and verification process to meet B2B standards.
Production Process
Starting with Fmoc-protected amino acids, the peptide chain is assembled on a resin support. The unique D-Arg and Dmt residues require careful coupling to avoid racemization. After cleavage and deprotection, the crude peptide is precipitated and dried.
Purification & Verification
Preparative reverse-phase HPLC is used to achieve the target purity. Each batch is then verified by analytical HPLC, mass spectrometry (MS), and amino acid analysis. Third-party testing for endotoxin levels and heavy metals is standard for cosmetic-grade material.
- HPLC Purity: ≥98% or ≥99% as specified, with a single main peak.
- Mass Spectrometry: Confirmed molecular weight within ±0.5 Da.
- Endotoxin Testing: <0.5 EU/mg for injectable-grade research use.
- Heavy Metals: Compliant with USP <232> standards.
- Certifications: COA, MSDS, and batch-specific HPLC chromatogram provided with every order.
Commercial Application Scenarios
The ss-31 peptide is primarily utilized in two commercial channels: cosmetic formulation and laboratory research. B2B buyers must understand the specific requirements of each application to select the appropriate grade and quantity.
Cosmetic Formulation
In advanced skincare, ss-31 peptide is incorporated into serums and creams at concentrations of 0.1% to 1%. Its mitochondrial-targeting property is leveraged for formulations aimed at supporting cellular energy metabolism. Cosmetic manufacturers require peptide with ≥98% purity and low endotoxin levels to ensure product safety and stability.
Laboratory Research
Research laboratories use ss-31 peptide for in vitro and in vivo studies investigating mitochondrial function. Typical orders range from 10 mg to 1 gram. Researchers demand ≥99% purity and full analytical documentation to ensure reproducibility of results.
Bulk Wholesale Usage
Large-scale buyers, such as contract manufacturing organizations (CMOs), purchase ss-31 peptide in multi-gram to kilogram quantities. They require consistent batch-to-batch quality, competitive pricing, and reliable supply chains. Custom packaging and labeling are often negotiated.
ss-31 peptide VS Ordinary Low-Grade Peptides
| Item | Our Product (ss-31 peptide) | Alternatives (Low-Grade Peptides) | Advantages |
|---|---|---|---|
| Purity | ≥98% or ≥99% by HPLC | Often <95% with multiple impurities | Higher purity ensures consistent results and fewer side reactions |
| Stability | Lyophilized, stable 24 months at -20°C | Degrades within 6 months under same conditions | Longer shelf life reduces waste and cost |
| Cost Performance | Competitive bulk pricing with full documentation | Lower upfront cost but higher failure rate | Lower total cost of ownership due to reliability |
| Technical Support | Full COA, MSDS, and batch traceability | Limited or no documentation provided | Supports regulatory compliance and research integrity |
Bulk Purchase Selection Guide
When sourcing ss-31 peptide for B2B operations, buyers must navigate common pitfalls to ensure they receive a high-quality product. This guide outlines key selection standards and a practical checklist for procurement professionals.
Common Pitfalls
One frequent issue is accepting peptides without full analytical data. A COA without HPLC chromatogram or MS spectrum is insufficient. Another pitfall is ignoring storage conditions during transit; peptides exposed to high temperatures may degrade before arrival. Finally, some suppliers offer "research grade" with no purity guarantee, leading to batch variability.
Selection Standards
Always request a batch-specific COA that includes HPLC purity, MS confirmation, and amino acid analysis. Verify that the supplier uses third-party testing for endotoxins and heavy metals. For cosmetic use, ensure the peptide is manufactured in a GMP-compliant facility.
- Documentation: COA, MSDS, HPLC chromatogram, MS spectrum.
- Purity: Minimum 98% for most applications; 99% for research.
- Packaging: Vacuum-sealed, light-protected vials or bags.
- Shipping: Cold chain with temperature monitoring for long distances.
- Supplier Reputation: Check for certifications and client reviews.
Core Product Advantages
The ss-31 peptide offered by our company is distinguished by three core advantages that directly benefit B2B buyers: purity, stability, and cost performance, all backed by comprehensive technical support.
Purity
Our peptide is synthesized using advanced SPPS with real-time monitoring to ensure chain fidelity. Final purity is verified by two independent HPLC methods, guaranteeing ≥98% or ≥99% as specified. This eliminates the risk of failed experiments or formulations due to impurities.
Stability
Lyophilization under controlled conditions preserves the peptide's structure. Accelerated stability studies show less than 2% degradation after 24 months at -20°C. This allows bulk buyers to stock inventory without frequent reordering.
Cost Performance & Technical Support
By optimizing our synthesis process, we offer competitive pricing without compromising quality. Every order includes a full documentation package, and our technical team is available to answer questions about handling, reconstitution, and formulation. This support reduces the learning curve for new users.
Frequently Asked Questions
Q1: What is the typical purity of ss-31 peptide for cosmetic formulation, and how is it verified?
For cosmetic formulation, we recommend ss-31 peptide with ≥98% purity. This is verified by analytical HPLC with a UV detector at 220 nm, and the COA includes the chromatogram showing a single main peak. Mass spectrometry is also performed to confirm the molecular weight.
Q2: How should ss-31 peptide be stored to maintain stability during long-term bulk storage?
The lyophilized ss-31 peptide should be stored at -20°C in a dry, dark environment. Avoid repeated freeze-thaw cycles. For bulk quantities, consider dividing into smaller aliquots to minimize exposure to moisture and temperature changes. Under these conditions, stability is guaranteed for 24 months.
Q3: What documentation is provided with a bulk order of ss-31 peptide?
Every bulk order includes a Certificate of Analysis (COA) with HPLC purity, MS confirmation, and amino acid analysis. We also provide a Material Safety Data Sheet (MSDS) and, upon request, third-party endotoxin and heavy metal test reports. Batch traceability is maintained for full transparency.