Name: SS-31 (Elamipretide) 50mg (10 Vials / Kit)
Brand: HK Peptide
SKU: HK-2S50
Price: 350.00 USD
Availability: InStock

What is SS-31 (Elamipretide)?

SS-31 is one of the Szeto-Schiller series of small, alternating aromatic-cationic peptides designed to cross cell membranes freely and accumulate specifically in the inner mitochondrial membrane rather than requiring a targeting sequence or carrier.

How it is understood to work

It is studied for binding to cardiolipin, a phospholipid central to organizing the electron transport chain on the inner mitochondrial membrane; this interaction is proposed to stabilize cristae structure, support more efficient ATP production and reduce excess reactive oxygen species from damaged mitochondria.

Research status

Under the name elamipretide, it has advanced through clinical trials for conditions involving mitochondrial dysfunction, including certain rare mitochondrial diseases, heart failure and age-related decline, though it has not yet secured broad regulatory approval as of early 2026. Preclinical work also spans ischemia-reperfusion injury and kidney-disease models.

This listing: HK Peptide SS-31 (Elamipretide)

Brand: HK Peptide
Kit: 10 vials × 50 mg (500 mg in total)
Price per vial: $35.00
Price per mg: $0.70
Other strengths: 10mg $75.00
Also sold by: Uther Peptide 50mg $350.00 · Uther Peptide 100mg $550.00 · Uther Peptide 10mg $70.00 · Uther Peptide 30mg $220.00

Lab testing

HK Peptide published a Janoshik #220486 report for this compound. Test: Purity & Content (HPLC). Result: 99.91% purity · 10.07 mg. Tested Sep 1, 2026. The vial tested was a different strength than this listing, so treat it as evidence for the compound and ask for the batch COA for this exact strength. Verification key AXGKCUI8YQNH can be checked at janoshik.com.

View the report · How to read it (Testing 101) · Every report for this compound

Bought through escrow: the brand is only paid after you confirm delivery. If the parcel never arrives, or an independent test shows the wrong compound or a significant under-fill, open a claim before releasing payment.

Specifications

Compound: SS-31 (Elamipretide)
Also known as: Elamipretide, Bendavia, MTP-131
Class: Mitochondria-targeted tetrapeptide
Form: Lyophilized (freeze-dried) powder
Molecular formula: C₃₂H₄₉N₉O₅
Molecular weight: 639.8 g/mol
Sequence: D-Arg-Dmt-Lys-Phe-NH2
Stated purity: ≥99% (HPLC)
Appearance: White lyophilized powder

Handling & storage

Supplied as a lyophilized powder; store unopened vials at -20 C protected from light, and after reconstitution with bacteriostatic water keep refrigerated and use within the timeframe set by the study protocol.

Concentration check: adding 2 ml of bacteriostatic water to one 50 mg vial gives 25 mg/ml. The Research Lab calculator in your dashboard works this out for any volume.

Questions

Is SS-31 the same compound studied clinically as elamipretide?

Yes, SS-31 and elamipretide refer to the same tetrapeptide (D-Arg-Dmt-Lys-Phe-NH2); ‘elamipretide’ is the name used in its clinical development, while ‘SS-31’ reflects its origin in the Szeto-Schiller peptide series.

Why is SS-31 described as mitochondria-targeted rather than cell-targeted?

Its alternating cationic and aromatic residues give it a strong, selective affinity for the inner mitochondrial membrane specifically, which is why research applications focus on mitochondrial bioenergetics rather than general cellular uptake.

How much SS-31 (Elamipretide) is in this kit?

10 vials of 50 mg each, so 500 mg in total. The lab testing section above shows what the brand’s tested vial actually contained.

For laboratory research use only. Not for human or veterinary use. Nothing on this page is medical advice.