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SS-31 Peptide

SS-31 (elamipretide)

Coming soon. SS-31 is not listed by a brand yet. Read the specs and research guide below, and join the Researcher Club to hear when it arrives.

CAS: 736992-21-5
Molecular weight: 639.79 g/mol
Length: 4 amino acids (tetrapeptide)

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SS-31 research guide · Updated 24 Oct 2026

What is SS-31?

SS-31, also known as elamipretide, is a synthetic tetrapeptide (4 amino acids) from the Szeto-Schiller peptide family. It binds cardiolipin, a lipid of the inner mitochondrial membrane, and is studied in mitochondrial research. It is supplied as a lyophilized powder for in vitro and preclinical laboratory research only.

Full specifications

Sequence: D-Arg-Dmt-Lys-Phe-NH2 (Szeto-Schiller/elamipretide)
Length: 4 amino acids (tetrapeptide)
CAS number: 736992-21-5
Molecular formula: C32H49N9O5
Molecular weight: 639.79 g/mol
Form: White lyophilized powder
Purity standard: 99% or higher (brand listing)
Storage: Before reconstitution 2 to 8 °C, dry and away from light. After reconstitution 2 to 8 °C, use within 28 days.

How SS-31 is tested

A good SS-31 listing comes with a lab report for the exact lot in the vial. These are the results to look for:

Purity (HPLC)
How much of the sample is the compound
Identity (MS or LCMS)
Confirms it is the right molecule
Net content
The real mg in the vial versus the label
Endotoxin (LAL)
Bacterial residue, reported in EU
Sterility
Confirms nothing is growing in the vial
Heavy metals (ICP-MS)
Arsenic, cadmium, lead and mercury

Storage and handling

Keep SS-31 vials at 2 to 8 °C, dry and away from light, before reconstitution. Once reconstituted for laboratory use, store at 2 to 8 °C and use within 28 days.

SS-31 vs MOTS-c

SS-31 is a synthetic peptide that targets the inner mitochondrial membrane. MOTS-c is a natural 16 amino acid peptide encoded in mitochondrial DNA. MOTS-c is sold here now.

Compound MOTS-c Lab reports and price per mg by brand Read more → Blend NAD+ Lab reports and price per mg by brand Read more →

When SS-31 will be available

SS-31 is coming soon to Online Peptide Market. When a brand lists it, this page will show its sizes, price per mg, shipping terms and the lab report for the lot. Join the Researcher Club to hear when it arrives.

Questions and answers

SS-31 questions, answered

Where can I buy SS-31?

SS-31 is coming soon to Online Peptide Market. Join the Researcher Club to hear as soon as a brand lists it, with its lab report, price per mg and shipping terms.

Is the SS-31 third-party tested?

SS-31 is coming soon. When a brand lists it, the lab report for its lot will appear on this page.

Is SS-31 the same as elamipretide?

Yes. SS-31 is the research code name and elamipretide is the international name for the same tetrapeptide, D-Arg-Dmt-Lys-Phe-NH2 (CAS 736992-21-5).

How should SS-31 be stored?

Before reconstitution, keep vials at 2 to 8 °C, dry and away from light. Once reconstituted for lab use, store at 2 to 8 °C and use within 28 days.

What does research use only mean?

Products are sold only for in vitro laboratory research. They are not drugs, supplements or cosmetics, are not FDA approved, and are not for human or veterinary use. Buyers must be 21 or older.

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