SS-31 Vial 50 mg Lot SS50-005: Certificate of Analysis (COA)
Peptira · tested Jul 3, 2026 by Freedom Diagnostics · Most recent COA
This page summarizes the third-party lab report for lot SS50-005 of SS-31 Vial 50 mg sold by Peptira. The lot number on this page should match the lot printed on the vial label. Don't rely on this summary alone: use the button to open the lab's own record and compare the lot, date and results.
SS-31 Vial 50 mg lot SS50-005 test results, explained
Every result printed on this certificate, as reported by Freedom Diagnostics, with a plain-English note on what the test measures. "Pass" and "specification" wording comes from the certificate; where the lab prints no pass/fail, we say so.
| Test | Result on the certificate | What it measures | This lot |
|---|---|---|---|
| HPLC purity | 99.95% · Per-vial HPLC purity: 99.94%, 99.97%, 99.98%, 99.91% | HPLC separates the sample into its components; purity is the share of the detected signal that sits in the main peak. On its own it doesn't show which molecule that peak is. That's what the identity test is for. | No pass/fail printed; reported value at or above 98% |
| Identity (LC-MS) | Confirmed · compound named: SS-31 | Mass spectrometry measures the molecular mass of what's in the vial and compares it with the declared compound. "Confirmed" means the lab found the expected compound. Expected average molecular weight of SS-31 (PubChem): 639.8 g/mol. The observed mass appears in the certificate's chart and isn't transcribed here. | Reported as matching the declared compound |
| Quantity (measured content) | per vial: 59.45 mg, 58.44 mg, 59.11 mg, 57.64 mg | How much peptide the lab measured in the vial, compared with the amount printed on the label. | Reported |
| Appearance | White Lyophilized Powder | What the lab recorded before testing: the colour and physical form of the material. | Recorded |
| Endotoxin (LAL assay (USP <85>)) | Pass (LAL, USP <85>) | Bacterial endotoxins are fragments of bacterial cell walls. The LAL assay measures them in endotoxin units (EU/mL); a pass means the result was under the lab's limit. | Pass (as reported by the lab) |
| Microbial screen (PCR) | Pass | A DNA-based (PCR) screen for common microbial contamination. It is a rapid screen, not a full sterility test. Test as named on the certificate: Microbial DNA (PCR). | Pass (as reported by the lab) |
| Fentanyl screen | Negative | A screen for fentanyl contamination. | Pass (as reported by the lab) |
Lot and report details
| Lot / batch number | SS50-005 |
|---|---|
| Product (as labeled by vendor) | SS-31 Vial 50 mg |
| Labeled vial size | 50 mg |
| Testing laboratory | Freedom Diagnostics |
| Sample received by lab | Jul 1, 2026 |
| Report date | Jul 3, 2026 |
| Method (as stated) | HPLC with UV detection coupled with mass spectrometry (LC-MS) |
| Search Code | Pept2607010510 |
| Lab-record check | On Oct 7, 2026 the vendor's PDF was byte-for-byte identical to the copy hosted on the lab's site. |
| Vendor | Peptira |
| Verify | Open Freedom Diagnostics's record ↗ |
Data notes: Lab received 07/01/2026, reported 07/03/2026 (MM/DD/YYYY).
The certificate itself
About Freedom Diagnostics
A peptide testing lab in Franklin, Tennessee (per the lab's website) that publishes its certificates in a searchable online database.
Accreditation: No accreditation is printed on these certificates, and we found no published ISO/IEC 17025 accreditation for the lab (checked Oct 7, 2026).
Tests: On the certificates here: HPLC purity with LC-MS identity, net content and, where ordered, endotoxin (LAL), a microbial PCR screen and other screens.
How to verify: Search the Search Code on freedomdiagnosticstesting.com. The lab hosts its own PDF copy of each certificate, which should match the vendor's copy.
Open Freedom Diagnostics's record ↗Lab info from: freedomdiagnosticstesting.com · checked Oct 7, 2026.
Compound reference: SS-31
- Also called
- elamipretide; Bendavia; MTP-131
- Sequence
- D-Arg-Dmt-Lys-Phe-NH₂ (Dmt = 2′,6′-dimethyltyrosine) (4 residues)
- Formula
- C32H49N9O5
- Mol. weight
- 639.8 g/mol
- CAS
- 736992-21-5
- Source
- PubChem CID 11764719 ↗
A synthetic tetrapeptide (Szeto-Schiller peptide 31), also known by the drug name elamipretide. Reference data only; it describes the molecule, not any use of it. For laboratory research use only.
SS-31 Vial 50 mg lot history at Peptira
All 5 certificates we have for this product from Peptira, newest first. The chart plots HPLC purity by report date (lots without a purity figure are left out). This lot is highlighted.
| Lot | Report date | Lab | HPLC purity |
|---|---|---|---|
| SS50-005 | Jul 3, 2026 | Freedom Diagnostics | 99.95% |
| SS50-004 | Dec 26, 2025 | Freedom Diagnostics | 99.96% |
| SS50-003 | Dec 23, 2025 | Freedom Diagnostics | 99.91% |
| SS50-002 | Sep 12, 2025 | Freedom Diagnostics | 99.91% |
| SS50-001 | Aug 13, 2025 | Janoshik | 99.59% |
Also available from Paramount Peptides
SS-31 is also carried by Paramount Peptides, our other tested supplier. These are the most recent SS-31 certificates we have from them; each links to its own lot page.
| Product | Lot | Report date | Lab | HPLC purity |
|---|---|---|---|---|
| SS-31 (14mg) | MS10N022626 | Mar 18, 2026 | Janoshik | 99.74% |
| SS-31 (14mg) | MS10N022826 | Mar 18, 2026 | Janoshik | 99.78% |
| SS-31 (15mg) | $3115N062025 | Jun 29, 2025 | Janoshik | 99.46% |
Where to get lab-tested SS-31: products, sizes and latest COAs →
What to check on your vial
- The lot number on the vial label reads SS50-005, character for character.
- The product name and vial size on the label match SS-31 Vial 50 mg (50 mg).
- The lab's own record (freedomdiagnosticstesting.com, code Pept2607010510) shows the same lot, report date (Jul 3, 2026) and results as this page.
- The report date is a date you'd expect for your purchase: a much older certificate may belong to an earlier lot.
- The identity line names the compound you expect. If it's "Not reported", the certificate doesn't confirm which molecule is in the vial.
- The certificate is a clean document: no mismatched fonts, edited numbers or a missing verification code.
How to check this COA in under a minute
- Find the lot number on your vial label and confirm it reads SS50-005.
- Open Freedom Diagnostics's record with the button above, or go to freedomdiagnosticstesting.com and enter Pept2607010510.
- Compare the lot number, test date, purity and identity result with the table above. They should be identical.
- New to COAs? Read How to read a peptide COA for what HPLC purity and mass spec identity mean.
Questions about lot SS50-005
What HPLC purity did SS-31 Vial 50 mg lot SS50-005 test at?
Freedom Diagnostics reported 99.95% HPLC purity for lot SS50-005 in a report dated Jul 3, 2026.
How do I verify the COA for lot SS50-005?
Go to freedomdiagnosticstesting.com and enter the search code Pept2607010510. The lab's own record should show lot SS50-005 with the same dates and results as this page.
Is lot SS50-005 the newest SS-31 Vial 50 mg lot from Peptira?
It's the most recent SS-31 Vial 50 mg certificate we have on file from Peptira as of Oct 8, 2026. Vendors can ship a newer lot before its certificate is posted, so check your vial label.
Does this certificate apply to my vial?
Only if the lot number printed on your vial reads SS50-005 exactly. A certificate of analysis covers one lot; it says nothing about other lots of the same product.
Other lots and COAs
SS-31 Vial 50 mg at Peptira
Lab-tested lot SS50-005 · 99.95% HPLC purity · Freedom Diagnostics
Affiliate disclosure: We earn a commission if you buy through the vendor links on this page, at no extra cost to you. Peptides & Coffee is an independent COA reference and is not owned by or affiliated with the vendors or labs listed. Lab results are published by the vendors and labs; we link to each lab's own verification record so you can check them yourself. Stock and lots change: the vendor may be shipping a newer lot than the one on this page, so check your vial label.