Shop
QualityLab ResultsPartnerLog In

SS-31

SS-31 at a glance

Peptide.Express SS-31 (CAS 736992-21-5) starts at $55, ≥99% pure by HPLC, with a molecular weight of 639.8 Da and molecular formula C32H49N9O5, third-party tested with a Certificate of Analysis you can verify before purchase. Ships same day on US orders placed before 2 PM EST, free over $150. For in-vitro laboratory research use only.

SS-31 — research-grade lyophilized peptide vial from Peptide.Express, ≥99% HPLC purity
≥99% PurityUS SynthesizedIn Stock

For laboratory research use only. Not for human or veterinary use.

Research-Grade Compound

SS-31 (elamipretide) is a synthetic, cell-permeable tetrapeptide that binds cardiolipin in the inner mitochondrial membrane. Sequence: D-Arg-2',6'-Dmt-Lys-Phe-NH2, where 2',6'-Dmt is 2',6'-dimethyltyrosine, a non-proteinogenic aromatic residue. Molecular formula C32H49N9O5, molecular weight 639.8 Da, CAS 736992-21-5. It belongs to the Szeto-Schiller (SS) peptide series developed by Hazel Szeto and Peter Schiller, and also appears in the literature under the development codes MTP-131 and Bendavia.

Purity standard: SS-31 is sourced to ≥99% by HPLC — sourcing spec.

1 · Select Size

10mg · $55.00/vial

$55.00$75.00ListUSD / Unit
1

Certificate of Analysis

Showing CoA for 10mg.

View CoA
HPLC VerifiedIdentity & purity
CoA Every OrderThird-party CoA
Ships Same DayBefore 2 PM EST
Free US ShipOrders over $150
Showing CoA for 10mg
Certificate Details
Accession / document id11148
Purity (measured)Not recorded
Sourcing spec≥99% by HPLC
Methodology
HPLCLC-MS/MS
CAS Number736992-21-5
Molecular FormulaC32H49N9O5
Molecular Weight639.8 g/mol
SequenceD-Arg-2',6'-Dmt-Lys-Phe-NH2 (cell-permeable tetrapeptide)

Issued by an independent third-party laboratory; Peptide.Express does not test in-house. Results are reproduced as-is and confirm compound identity, purity, and the analytical methods used. For questions about specific results, contact support@peptide.express.

Safety Data Sheet (SDS)
≥99% by HPLCLC-MS/MS VerifiedCoA Every BatchIn-Vitro Research Use Only

SS-31 Specifications

Identity, purity and storage specifications for SS-31.
CompoundSS-31 (elamipretide)
CAS736992-21-5
Molecular formulaC32H49N9O5
Molecular weight639.8 Da
SequenceD-Arg-2',6'-Dmt-Lys-Phe-NH2
Purity≥99% by HPLC
FormLyophilized powder
Storage (lyophilized)-20°C, desiccated, protected from light
Storage (reconstituted)2–8°C, use within 14–28 days

Reconstituting SS-31: step-by-step peptide reconstitution guide. Concentration maths: peptide reconstitution calculator.

Buying SS-31 — Frequently Asked Questions

What purity standard does Peptide.Express use for SS-31?

≥99% by reverse-phase HPLC with LC-MS/MS confirming the 639.8 Da mass. The mass check matters more than usual here because SS-31 contains a non-standard residue and a D-amino acid — a synthesis that substituted L-arginine or plain tyrosine would produce a peptide of very similar mass but different behavior, so the chromatographic profile on the CoA is worth reading alongside the mass.

Where is the Certificate of Analysis for SS-31?

On this page and in the Peptide.Express lab results library, tied to the batch number printed on the vial label. Each CoA lists HPLC purity, LC-MS/MS mass confirmation, endotoxin result, testing laboratory and test date.

How should SS-31 be stored?

Lyophilized at -20°C, desiccated and light-protected, stable for 24 months. Reconstituted, at 2–8°C for 14–28 days. Do not freeze the reconstituted solution.

SS-31 research reference

Research Compounds Related to SS-31

NAD+The substrate-replacement counterpart to SS-31 structural protection in mitochondrial studies.MOTS-cMitochondrial-derived peptide acting through AMPK signalling rather than membrane structure.Mitochondrial Fuel StackMOTS-c and NAD+ supplied together for signalling-plus-substrate study designs.Bacteriostatic WaterPreserved diluent for reconstituting lyophilized SS-31.

All products are sold for in-vitro laboratory research use only. Not intended for human consumption, clinical use, or veterinary use. Peptide.Express makes no medical claims. Consult the published literature for research application guidance.

What we can show you the numbers for