SS-31
SS-31 is a synthetic mitochondria-targeted tetrapeptide, D-Arg-Dmt-Lys-Phe, with the molecular formula C32H49N9O5 and a molecular weight of 639.80 g/mol.
Identity & structure
Verified identifiers, sequence, and analytical properties — every value machine-readable and independently sourceable against PubChem.
Primary sequence · 4 residues · C-terminal amide.
| Identity | |
|---|---|
| CAS | 736992-21-5 |
| PubChem CID | 11764719 |
| FDA UNII | 87GWG91S09 |
| Also known as | SS 31, SS-31 peptide, Elamipretide, MTP-131, Szeto-Schiller peptide |
| Research class | Regenerative & Cytoprotective |
| Structure | |
| Molecular formula | C32H49N9O5 |
| InChIKey | SFVLTCAESLKEHH-WKAQUBQDSA-N |
| Sequence | D-Arg-Dmt-Lys-Phe |
| Length | 4 residues |
| Analytical | |
| Average molecular weight | 639.80 g/mol |
| Monoisotopic mass | 639.3857 Da |
| Form | Lyophilized powder |
| Solubility | Water-soluble |
| Storage | 2–8 °C, desiccated |
Where SS-31 sits in its class
Molecular weight (g/mol) across the 15 characterized compounds in Regenerative & Cytoprotective. Compare all compounds →
Research context
SS-31 is a synthetic mitochondria-targeted tetrapeptide, D-Arg-Dmt-Lys-Phe, with the molecular formula C32H49N9O5 and a molecular weight of 639.80 g/mol. It is studied in cytoprotection and mitochondrial research and is supplied as a characterized reference material, with identity confirmed by electrospray mass spectrometry and purity measured by reversed-phase HPLC.
Supplied solely as a characterized research material. No representation is made as to any biological effect. For Research Use Only — not for human or veterinary use.
How SS-31 is identified
Identity and purity are measured, not asserted. Electrospray mass spectrometry (ESI-MS) determines the mass-to-charge ratio of the intact molecule — an observed value matching the expected series above confirms the molecular formula. Reversed-phase HPLC separates the sample over time, and purity is read as arithmetic: the target peak’s area as a share of total peak area.
Handling & stability
Physical form, storage, and solubility as supplied. Handling guidance only — no use protocols.
Related compounds
Other compounds in this research class.
Frequently asked questions
What is SS-31?
What is the molecular formula of SS-31?
What is the CAS number of SS-31?
How is the identity of SS-31 confirmed?
How should SS-31 be stored?
Is SS-31 a peptide?
Is SS-31 approved for human use?
Data, tools & certificates
References
- PubChem — compound identity, structure & computed properties (CID 11764719). PubChem →
- CAS Registry Number 736992-21-5.
- FDA Global Substance Registration System — UNII 87GWG91S09.
Research professionals only
SS-31 — from the record to the bench
The monograph and every lot certificate stay public. Pricing and ordering open for verified research professionals.