What is the CAS number for SS-31?

The CAS number for SS-31 is 736992-21-5. Its molecular formula is C₃₂H₄₉N₉O₆ · 4HCl (MW 640.80 g/mol (free base)).

What doses of SS-31 are available wholesale?

Wholesale Peptide Supply stocks SS-31 in 10mg. Wholesale pricing is provided by quote based on order volume, from a 3-kit (30-vial) order minimum, mix and match across doses and compounds.

Is SS-31 third-party tested?

Yes. Every lot of SS-31 is tested by an independent third-party laboratory, and a per-lot Certificate of Analysis documenting identity and purity is included with every order at no charge, issued in the name of Wholesale Peptide Supply. The most recent published lot, DPS-1264076 (10mg), was tested by Horizon Analytical on 3 October 2026 by UPLC/MS: purity 99.41%, endotoxin <0.05 EU/mL. Every lot on file is listed with its certificate on this page.

Is SS-31 for human use?

No. SS-31 is sold strictly as a chemical reagent for in-vitro laboratory research and is not for human or veterinary use. Wholesale Peptide Supply is not a pharmacy or compounding facility.

How do I get wholesale pricing for SS-31?

Request a quote through our contact form or open a wholesale account. An account manager replies with volume pricing and lead times the same day. For anything urgent, text or call (714) 625-9215 to reach a real person in the US.

Can I order SS-31 in bulk?

Yes. SS-31 is available for bulk and wholesale orders, quoted by dose and volume, from a 3-kit (30-vial) order minimum, mix and match across doses and compounds, with lower prices at 10 kits and at 100 kits (1,000 vials) in the order. Submit the doses and quantities you need for a bulk quote.

Why does the SS-31 molecular weight differ from the vial contents?

SS-31 is supplied as a tetrahydrochloride salt (C₃₂H₄₉N₉O₆ · 4HCl), while the quoted 640.80 g/mol is the free-base weight. For quantitative laboratory work, use the salt mass or the per-vial peptide content documented on the per-lot Certificate of Analysis rather than the free-base figure.

Is SS-31 the same compound as elamipretide?

Yes. SS-31 and elamipretide refer to the same mitochondria-targeting tetrapeptide, CAS 736992-21-5. It was the first compound in the Szeto-Schiller peptide class, developed at Weill Cornell Medicine in the early 2000s. It is supplied for laboratory research use only.

Research Use Only. SS-31 is sold as a chemical reagent for in-vitro laboratory research, not for human or veterinary use. It is not a drug, supplement, or compounded preparation. It must be handled by qualified professionals. Wholesale Peptide Supply is not a pharmacy or compounding facility under 503A or 503B.

Anti-Aging & LongevityCAS 736992-21-5

Wholesale SS-31 — Bulk Research Supply

Q: What is SS-31?

SS-31 (Elamipretide) is a mitochondria-targeting tetrapeptide that selectively accumulates at the inner mitochondrial membrane and interacts with cardiolipin. Studied for effects on cristae architecture, ATP synthesis, and ROS modulation.

Q: Is SS-31 for human use?

No. SS-31 is sold strictly as a chemical reagent for in-vitro laboratory research and is not for human or veterinary use. Wholesale Peptide Supply is not a pharmacy or compounding facility.

Q: How do I get wholesale pricing for SS-31?

Request a quote through our contact form or open a wholesale account. An account manager replies with volume pricing and lead times the same day. For anything urgent, text or call (714) 625-9215 to reach a real person in the US.

Q: Can I order SS-31 in bulk?

Yes. SS-31 is available for bulk and wholesale orders, quoted by dose and volume, from a 3-kit (30-vial) order minimum, mix and match across doses and compounds, with lower prices at 10 kits and at 100 kits (1,000 vials) in the order. Submit the doses and quantities you need for a bulk quote.

Q: Why does the SS-31 molecular weight differ from the vial contents?

SS-31 is supplied as a tetrahydrochloride salt (C₃₂H₄₉N₉O₆ · 4HCl), while the quoted 640.80 g/mol is the free-base weight. For quantitative laboratory work, use the salt mass or the per-vial peptide content documented on the per-lot Certificate of Analysis rather than the free-base figure.

Q: Is SS-31 the same compound as elamipretide?

Yes. SS-31 and elamipretide refer to the same mitochondria-targeting tetrapeptide, CAS 736992-21-5. It was the first compound in the Szeto-Schiller peptide class, developed at Weill Cornell Medicine in the early 2000s. It is supplied for laboratory research use only.

Available sizes

10mg$23.36/vial See pricing & order

In-stock orders ship same day when paid by 1 pm PT, Mon–Fri. Overnight available.

Buy SS-31 wholesale and in bulk from a US-based research peptide supplier. Every lot is sourced in the USA and third-party tested, with the lab and method on each lot's certificate. Bulk SS-31 is quoted by dose and volume from a 3-kit (30-vial) order minimum, mix and match across doses and compounds; lower prices are earned at 10 kits and again at 100 kits in the order, mix and match.

SS-31 (Elamipretide) is a mitochondria-targeting tetrapeptide that selectively accumulates at the inner mitochondrial membrane and interacts with cardiolipin. Studied for effects on cristae architecture, ATP synthesis, and ROS modulation.

Wholesale SS-31 10mg lyophilized vial — Wholesale Peptide Supply — SS-31 10mg lyophilized vial as supplied. Labeling is customizable for private-label orders.

Wholesale Catalog

Available Doses

Published per-vial wholesale pricing for SS-31. Sold in kits of 10 vials with a 3-kit (30-vial) order minimum, mix and match across doses and compounds; lower prices apply at 10 kits and at 1,000+ vials in the order. Contact us for larger or custom-volume quotes — answered the same day. Urgent? Text or call (714) 625-9215 — you’ll reach a real person in the United States, not a chatbot or an overseas call center.

SS-31 10mg

WPS2S10 · CAS 736992-21-5 · Anti-Aging & Longevity

1–9 kits: $23.36/vial$21.03 paying by card
10–99 kits: $18.69/vial$16.82 paying by card
100+ kits: $14.95/vial$13.46 paying by card

10% off with card Every product, every volume band — taken off at checkout when you choose card.

Sold in kits of 10 vials · 3-kit order minimum, mix and match · price set by the total kits in your order (BAC water not counted)

Quantity

vials

3 kits

Request a custom quote

Questions? Text a rep or call (714) 625-9215 — a real person in the US answers.

Overview

History

Developed by Hazel Szeto and Peter Schiller at Weill Cornell Medicine in the early 2000s; first in the SS peptide class.

Structure and mechanism

SS-31 (elamipretide) is a tetrapeptide with an alternating aromatic-cationic motif, and that architecture is what gives it its defining property: it concentrates at the inner mitochondrial membrane without depending on the membrane potential that most mitochondrial probes rely on. Once there it associates with cardiolipin, the signature phospholipid of the inner membrane.

In preclinical laboratory models the research questions follow from that binding — how cardiolipin association affects cristae architecture, what happens to electron-transport efficiency and ATP synthesis when the membrane's lipid environment is stabilized, and how reactive oxygen species behave under ischemia-reperfusion conditions. It was the first compound in the SS (Szeto-Schiller) peptide class, developed at Weill Cornell in the early 2000s.

Reconstitution and handling (research use)

Wholesale SS-31 ships as a lyophilized tetrahydrochloride salt. One handling detail matters more here than with most peptides: the stated molecular weight of 640.80 g/mol is the free base, while the material in the vial is the 4HCl salt (C₃₂H₄₉N₉O₆ · 4HCl). Concentration calculations should use the salt mass for the weighed quantity, or the per-vial peptide content stated on the COA, rather than the free-base figure.

The compound is highly water-soluble and reconstitutes readily in bacteriostatic or sterile water. Lyophilized material is stored at -20°C protected from light; reconstituted solution is refrigerated at 2–8°C. These notes describe general laboratory handling of a chemical reagent only — not human or veterinary use.

Wholesale sourcing notes

SS-31 is stocked wholesale in a 10 mg presentation. Every lot is US-sourced and independently verified by a third-party lab for identity, purity, and quantitation, with a per-lot COA included in every order.

Because the material is supplied as a salt, the per-lot COA matters for quantitative work — it documents the actual peptide content rather than the gross fill weight. Pricing is in three bands set by the order's total kits — 1–9 kits, 10–99 kits and 100+ kits (1,000 vials), mix and match — from a 3-kit (30-vial) order minimum, mix and match across doses and compounds.

Also in this research area

If you stock SS-31, see also MOTS-C, FOXO4-DRI, Pinealon and Cartalax. Each page lists its sizes and per-vial pricing.

Certificates of Analysis

8 certificates are on file for SS-31 — open any one to read the full report.

Lot / Lab	Dose	Tested	Purity
DPS-1264076Horizon AnalyticalUPLC/MS	10mg	2026-10-03	99.41%Endotoxin <0.05 EU/mL
100089-0956Optiq Health LabsRP-HPLC / LC-MS	10mg	2026-08-20	—
100089-0957Optiq Health LabsRP-HPLC / LC-MS	50mg	2026-08-20	—
100057-0616Optiq Health LabsRP-HPLC / LC-MS	50mg	2026-08-05	—
100032-0307Optiq Health LabsRP-HPLC / LC-MS	10mg	2026-07-29	—
100032-0328Optiq Health LabsRP-HPLC / LC-MS	10mg	2026-07-29	—
100032-0309Optiq Health LabsRP-HPLC / LC-MS	50mg	2026-07-29	—
2606AFL1031.3699Accurate Test LabsPurity & potency assay	10mg	On file	—

Key Areas of Research

Cardiolipin interaction, cristae remodeling
ATP synthesis dynamics
ROS modulation, ischemia-reperfusion

References

Szeto H.H. (2014). Br J Pharmacol 171(8):2029–2050.
Birk A.V. et al. (2013). J Am Soc Nephrol 24(8):1250–1261.

SS-31 — Frequently Asked Questions

What is SS-31?: SS-31 (Elamipretide) is a mitochondria-targeting tetrapeptide that selectively accumulates at the inner mitochondrial membrane and interacts with cardiolipin. Studied for effects on cristae architecture, ATP synthesis, and ROS modulation.
What is the CAS number for SS-31?: The CAS number for SS-31 is 736992-21-5. Its molecular formula is C₃₂H₄₉N₉O₆ · 4HCl (MW 640.80 g/mol (free base)).
What doses of SS-31 are available wholesale?: Wholesale Peptide Supply stocks SS-31 in 10mg. Wholesale pricing is provided by quote based on order volume, from a 3-kit (30-vial) order minimum, mix and match across doses and compounds.
Is SS-31 third-party tested?: Yes. Every lot of SS-31 is tested by an independent third-party laboratory, and a per-lot Certificate of Analysis documenting identity and purity is included with every order at no charge, issued in the name of Wholesale Peptide Supply. The most recent published lot, DPS-1264076 (10mg), was tested by Horizon Analytical on 3 October 2026 by UPLC/MS: purity 99.41%, endotoxin <0.05 EU/mL. Every lot on file is listed with its certificate on this page.
Is SS-31 for human use?: No. SS-31 is sold strictly as a chemical reagent for in-vitro laboratory research and is not for human or veterinary use. Wholesale Peptide Supply is not a pharmacy or compounding facility.
How do I get wholesale pricing for SS-31?: Request a quote through our contact form or open a wholesale account. An account manager replies with volume pricing and lead times the same day. For anything urgent, text or call (714) 625-9215 to reach a real person in the US.
Can I order SS-31 in bulk?: Yes. SS-31 is available for bulk and wholesale orders, quoted by dose and volume, from a 3-kit (30-vial) order minimum, mix and match across doses and compounds, with lower prices at 10 kits and at 100 kits (1,000 vials) in the order. Submit the doses and quantities you need for a bulk quote.
Why does the SS-31 molecular weight differ from the vial contents?: SS-31 is supplied as a tetrahydrochloride salt (C₃₂H₄₉N₉O₆ · 4HCl), while the quoted 640.80 g/mol is the free-base weight. For quantitative laboratory work, use the salt mass or the per-vial peptide content documented on the per-lot Certificate of Analysis rather than the free-base figure.
Is SS-31 the same compound as elamipretide?: Yes. SS-31 and elamipretide refer to the same mitochondria-targeting tetrapeptide, CAS 736992-21-5. It was the first compound in the Szeto-Schiller peptide class, developed at Weill Cornell Medicine in the early 2000s. It is supplied for laboratory research use only.