SS-31 COA Lookup: Verify Your Lot Number
Analytical transparency is critical when conducting quantitative preclinical assays with synthetic peptides. Use this verification guide to locate the lot number on your SS-31 vial, cross-reference it with our laboratory documentation, and interpret HPLC, MS, and endotoxin analytical certificates.
Quick answer
Analytical transparency is critical when conducting quantitative preclinical assays with synthetic peptides. Use this verification guide to locate the lot number on your SS-31 vial, cross-reference it with our laboratory documentation, and interpret HPLC, MS, and endotoxin analytical certificates.
Key takeaways
- In cell culture models and isolated tissue experiments, experimental reproducibility hinges upon compound purity, sequence accuracy, and the absence of cytotoxic contaminants.
- Every research vial dispatched from PX1 Research facilities features a standardized, tamper-evident label designed to preserve critical identification markers under laboratory storage conditions.
- Once you have recorded the lot identifier from your physical vial, navigate directly to the PX1 Research [centralized COA lookup portal](/coa).
- High-Performance Liquid Chromatography (HPLC) is the primary analytical method utilized to quantify chemical purity and detect organic impurities in synthetic peptides.
The Importance of Lot-Specific Verification in Peptide Research
In cell culture models and isolated tissue experiments, experimental reproducibility hinges upon compound purity, sequence accuracy, and the absence of cytotoxic contaminants. The synthetic tetrapeptide SS-31 (also known as Elamipretide or D-Arg-Dmt-Lys-Phe-NH2) interacts specifically with cardiolipin within the inner mitochondrial membrane in preclinical models. To ensure that observed biological responses are attributable solely to the target molecule and not to residual reagents or truncated peptide sequences, rigorous lot-by-lot analytical verification is required.
PX1 Research maintains complete analytical traceability for every production batch. Principal investigators can reference the ss-31 coa lot number on every container to retrieve third-party analytical documentation prior to reconstituting reagents for in vitro studies. Evaluating the Certificate of Analysis (COA) before initiating a protocol eliminates variables associated with batch variance, sub-standard purity, or unquantified endotoxin levels. Researchers evaluating the SS-31 research peptide can inspect full spectrum data to verify compound integrity before committing laboratory resources.
How to Locate the Lot Number on Your SS-31 Vial
Every research vial dispatched from PX1 Research facilities features a standardized, tamper-evident label designed to preserve critical identification markers under laboratory storage conditions. The lot number is printed directly on the primary label adjacent to the compound name, nominal mass, and storage temperature requirements.
To locate your lot identifier, inspect the lower right quadrant or side panel of the vial label. The identifier follows a structured alphanumeric format (e.g., `LOT-SS31-XXXXX`). This unique code links the individual vial back to its specific synthesis run, purification batch, lyophilization cycle, and ISO 17025 third-party testing package. If the vial is stored at lower temperatures, allow the container to reach room temperature before wiping away any external condensation so the label text remains fully legible.
Accessing the Live COA Library
Once you have recorded the lot identifier from your physical vial, navigate directly to the PX1 Research centralized COA lookup portal. This searchable database houses complete analytical documentation for every lot produced across our entire inventory.
To retrieve your certificate, enter the full lot string into the lookup search field. The database instantly filters available documentation and provides a downloadable, high-resolution PDF certificate. Each certificate includes complete raw instrument outputs, including full-scale High-Performance Liquid Chromatography (HPLC) chromatograms and Mass Spectrometry (MS) spectra. If you are handling multiple target compounds across a study, you can similarly audit products across our complete catalog of research peptides using the same centralized database.
Interpreting HPLC Purity Data for SS-31
High-Performance Liquid Chromatography (HPLC) is the primary analytical method utilized to quantify chemical purity and detect organic impurities in synthetic peptides. When reviewing the HPLC section of your SS-31 COA, you will observe a chromatogram displaying signal intensity (measured in milli-absorbance units, mAU) against retention time (minutes).
Purity is calculated via peak area integration. The main peak corresponding to SS-31 must account for the vast majority of the total integrated peak area. PX1 Research mandates a baseline analytical purity of ≥98.0% for all research-grade peptide lots. Minor secondary peaks represent trace deletion sequences or truncated peptides originating during solid-phase peptide synthesis (SPPS). Examining the baseline separation and peak symmetry confirms that non-target organic artifacts are kept well below thresholds that could interfere with receptor binding or cellular assays.
Verifying Molecular Identity via Mass Spectrometry
While HPLC confirms chemical homogeneity, Mass Spectrometry (MS) confirms molecular identity by measuring the mass-to-charge ratio (m/z) of the ionized peptide. Because synthetic errors can occasionally produce impurities with retention times identical to the target compound, MS analysis is vital for absolute molecular confirmation.
For SS-31 (chemical formula C32H49N9O5, theoretical monoisotopic mass ~639.8 g/mol), the electrospray ionization (ESI-MS) spectrum displays dominant molecular ion peaks corresponding to the protonated state `[M+H]+` or multi-charged species `[M+2H]2+`. The COA provides both the calculated theoretical mass and the experimentally observed mass. Alignment between these values within strict instrument tolerance (typically ±0.5 Da) proves that the synthesized compound possesses the precise atomic composition expected for SS-31.
Evaluating Endotoxin Quantifications and LAL Testing
Endotoxins—lipopolysaccharides (LPS) derived from the outer membrane of Gram-negative bacteria—are potent pyrogens that can induce non-specific inflammatory signaling in primary cell cultures, isolated mitochondria, and animal tissue models. For sensitive preclinical research, unquantified endotoxin contamination can completely invalidate experimental data.
PX1 Research subjects every lot of SS-31 to rigorous Limulus Amebocyte Lysate (LAL) kinetic chromogenic testing. The resulting COA explicitly states the endotoxin concentration expressed in Endotoxin Units per milligram (EU/mg). Our internal target standards require endotoxin levels to remain significantly below standard research thresholds (typically <0.1 EU/mg). Reviewing this metric ensures that cellular responses observed during in vitro exposure are driven by the compound's targeted mitochondrial mechanism rather than endotoxin-mediated Toll-like receptor activation.
Net Peptide Content vs. Gross Lyophilized Weight
A common point of confusion during laboratory preparation is the distinction between gross lyophilized cake mass and net peptide content. Lyophilized peptide preparations naturally retain trace amounts of counter-ions (such as acetate or trifluoroacetate) and bound water molecules absorbed during the freeze-drying process.
The COA lists the Net Peptide Content (expressed as a percentage, typically ranging between 80% and 90%), determined via elemental nitrogen analysis or amino acid analysis (AAA). When preparing precise molar solutions for quantitative assays, research staff should adjust solvent volumes based on net peptide content rather than assuming 100% dry mass composition. To simplify calculations during trial setup, researchers can utilize our laboratory reconstitution calculator to determine precise diluent volumes for desired concentrations.
Comparative Analysis: SS-31 and Related Mitochondrial Research Compounds
When designing mitochondrial bioenergetic experiments, investigators often compare SS-31 against other novel peptides that target cellular respiration, stress response pathways, or tissue repair mechanisms. Understanding analytical variance across these related research tools helps establish appropriate baseline controls.
For example, researchers exploring mitochondrial-derived peptides frequently contrast the cardiolipin-binding mechanism of SS-31 with the open reading frame signaling of the MOTS-c peptide or the cytoprotective properties of Humanin. Additionally, investigators running comparative tissue recovery assays may cross-reference these mitochondrial agents with systemic repair factors such as BPC-157. Regardless of the specific peptide class under investigation, every lot across all catalog categories undergoes identical HPLC/MS purity testing and LAL endotoxin screening to guarantee consistency across multi-compound comparative designs.
PX1 Research Quality Assurance and Storage Protocols
All PX1 Research peptides are manufactured under strict Good Manufacturing Practice (GMP) compliant conditions within USA-based facilities. Every batch undergoes independent verification in ISO 17025 accredited analytical laboratories prior to being cleared for distribution. Products are shipped directly from our primary distribution hubs in California and Arizona, with same-day dispatch for orders placed Monday through Friday.
To maintain the analytical specifications documented on your COA, proper laboratory storage is essential. Lyophilized SS-31 should be stored at -20°C in a desiccated environment protected from light. Upon reconstitution with sterile bacteriostatic or deionized water, aqueous solutions should be aliquoted into single-use microcentrifuge tubes to avoid freeze-thaw degradation and maintained at -80°C for long-term study protocols. Further documentation regarding stability parameters can be reviewed in the PX1 research library.
Procedure for Reporting Batch Discrepancies
In the rare event that an entered lot number does not immediately yield a downloadable certificate, or if your internal laboratory quality control scan identifies a potential variance in physical appearance or solubility, immediate quarantine protocols should be enacted.
First, re-verify the full alphanumeric sequence entered into the lookup field to rule out typographical errors. If documentation remains inaccessible, contact PX1 Technical Support with the exact lot number printed on the vial. For institutional research facilities operating under formal quality management systems, our support team can provide full batch release records and coordinate secondary analytical verification via our bulk lab supply program compliance department.
Frequently Asked Questions
Where is the ss-31 coa lot number located on the product packaging?
The lot number is printed directly on the primary vial label, positioned adjacent to the product name and mass specifications. It follows an alphanumeric format such as LOT-SS31-XXXXX.
What HPLC purity standard does PX1 Research guarantee for SS-31?
PX1 Research mandates a minimum HPLC purity standard of ≥98.0% for all research-grade SS-31 lots. Actual analytical results for each specific batch are documented on its corresponding COA.
Why is Mass Spectrometry (MS) required in addition to HPLC testing?
While HPLC confirms chemical purity and peak homogeneity, Mass Spectrometry measures the exact mass-to-charge ratio to verify molecular identity and confirm correct amino acid assembly.
What endotoxin threshold is acceptable for SS-31 in cell culture research?
PX1 Research lots are screened via LAL assay to ensure endotoxin levels remain below standard research limits, typically <0.1 EU/mg, preventing non-specific immune activation in vitro.
How does net peptide content impact concentration calculations?
Net peptide content accounts for residual counter-ions and moisture in the lyophilized cake. Adjusting diluent volumes based on net content ensures precise molarity during stock solution preparation.
How should reconstituted SS-31 be stored to maintain its verified purity?
Reconstituted SS-31 should be aliquoted into sterile containers and stored at -80°C to minimize degradation. Repeated freeze-thaw cycles should be strictly avoided.
What should I do if my SS-31 lot number is not returning a result on the COA portal?
Verify the character string entered into the search field. If the system still does not display the record, contact PX1 Technical Support with the lot details for direct retrieval.
Are PX1 Research peptides tested by independent analytical laboratories?
Yes, every production lot undergoes independent third-party analytical testing at ISO 17025 accredited laboratories prior to final lot release.
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