What is the CAS number for SS-31 (elamipretide)?

PubChem lists elamipretide (SS-31) as CID 11764719 with CAS number 736992-21-5, molecular formula C32H49N9O5, and a molecular weight of 639.8 g/mol. It is a tetrapeptide: D-Arg-Dmt-Lys-Phe-NH2, where Dmt is 2,6-dimethyl-L-tyrosine.

Are SS-31 and elamipretide the same compound?

Yes. PubChem lists SS-31 as a synonym of elamipretide, along with MTP-131 and Szeto-Schiller peptide. A research listing may use either name; the CAS number and sequence should match the same record.

What SS-31 vials does peptide.prof list?

SS-31 is listed as a 10 mg lyophilized powder vial, one vial per pack, sold as a 1 pack, 2 pack, or 6 pack. It is a vial listing, not a pen. Research use only.

How much does SS-31 cost on peptide.prof?

At the time of writing, the SS-31 product page shows 1 pack at $65, the 2 pack at $61 each, and the 6 pack at $57 each. The live buy box on the product page is the source of truth for price and stock.

Where can I buy SS-31 peptide for research?

peptide.prof lists SS-31 10 mg lyophilized research vials on its SS-31 product page, paid by Venmo or crypto and shipped to a US address after payment. Research use only.

Does peptide.prof give SS-31 dosing or reconstitution instructions?

No. peptide.prof sells laboratory research material only. Not for human or veterinary use. The site does not publish dose, administration, or reconstitution instructions.

Buyer checklist

SS-31 (elamipretide) buyer checklist: CAS, sequence, vial specs, and RUO labeling

Published November 9, 2026 · Updated November 9, 2026 · Research use only

Before you buy SS-31 for laboratory work, confirm that the listing matches the public record for elamipretide, check the vial strength and form, compare pack pricing, and make sure the page is labeled research use only. This checklist covers each step and shows what peptide.prof publishes today.

peptide.prof lists SS-31 as a 10 mg lyophilized research vial with 1, 2, and 6 pack pricing.

Open the SS-31 10 mg research vial page →

1. Identity: SS-31 is elamipretide

"SS-31" and "elamipretide" name the same compound. A short peptide like this should be easy to match to a public chemical record. The reference record is PubChem CID 11764719:

Field	Value (PubChem)
Name	Elamipretide
Synonyms	SS-31, MTP-131, Szeto-Schiller peptide
CAS number	736992-21-5
Sequence	D-Arg-Dmt-Lys-Phe-NH2 (Dmt = 2,6-dimethyl-L-tyrosine); a tetrapeptide amide
Molecular formula	C32H49N9O5
Molecular weight	639.8 g/mol

Two details are worth checking on any SS-31 listing. First, the first residue is D-arginine, not the usual L form, and the second is the modified residue Dmt rather than plain tyrosine. Second, the PubChem values above are for the parent compound. If a certificate reports a salt form (for example an acetate), its formula weight will differ, so check which form the document describes.

If a listing uses a different CAS number, gives a different sequence, or never names the compound clearly, ask the seller why before you order.

2. Vial specs: what "SS-31 10mg" means on the page

"SS-31 10mg" should mean a stated 10 mg of material per vial, with the form named. Here is what the peptide.prof SS-31 page states:

Spec	peptide.prof SS-31 listing
Form	Lyophilized powder
Strength	10 mg per vial
Packs	One vial per pack; 1 pack, 2 pack, or 6 pack
Format	Vial listing, not a pen
Intended use	Laboratory research only. Not for human or veterinary use.

3. SS-31 price: pack pricing in plain numbers

A buyer-friendly page shows the per-pack price before checkout. At the time of writing, the SS-31 buy box shows:

Pack	Price
1 pack (1 × 10 mg vial)	$65
2 pack	$61 each
6 pack	$57 each

The live buy box on the SS-31 product page is always the source of truth for price and stock. Bacteriostatic water is not included with the vial. It is a separate catalog line (bacteriostatic water, 3 mL and 10 mL) with its own stock status. This site does not publish reconstitution or mixing instructions.

4. Research-use-only labeling

Elamipretide has been studied as a drug candidate, and an SS-31 research vial is not a pharmaceutical product. A research listing is a laboratory material purchase, and the page should say so clearly:

States research use only and not for human or veterinary use.
Contains no dose, administration, or "protocol" copy.
Makes no treatment, energy, anti-aging, or health claims.

peptide.prof repeats that framing in the site bar, the buy box, the specifications block, and the FAQ on every product page. For background on the label category, see the RUO peptides hub and the research use page.

5. Purity and lot documentation

Ask whether a lot-level certificate of analysis (COA) is available, and read what the store actually publishes. The peptide.prof homepage trust list says "Batch COA when listed," which is an on-page policy, not a promise that every product shows a PDF at all times. If a certificate is posted, match its lot details and identity result (expected molecular weight about 639.8 g/mol for the parent compound) to your order. If none is shown, do not assume a purity percentage the store has not published.

SS-31 buyer checklist you can reuse

Does the page name SS-31 or elamipretide and give CAS 736992-21-5 or a sequence that matches the public record?
Is the strength stated as 10 mg per vial, with the form (lyophilized powder) named?
Are pack prices written as numbers you can quote before checkout?
Does it say research use only, with no dosing copy or health claims?
Is there a clear statement about lot certificates, and is any certificate actually posted?
Are payment methods and the ship-to country stated before checkout?

On peptide.prof, payment goes to the store by Venmo or crypto, and orders ship to a United States address after payment is confirmed.

Ready to buy SS-31 peptide for laboratory research? Pick a pack size on the product page and check out when you are ready. Research use only.

Buy SS-31 10 mg research vials →

FAQ

What is the CAS number for SS-31 (elamipretide)?: PubChem lists elamipretide (SS-31) as CID 11764719 with CAS number 736992-21-5, molecular formula C32H49N9O5, and a molecular weight of 639.8 g/mol. It is a tetrapeptide: D-Arg-Dmt-Lys-Phe-NH2, where Dmt is 2,6-dimethyl-L-tyrosine.
Are SS-31 and elamipretide the same compound?: Yes. PubChem lists SS-31 as a synonym of elamipretide, along with MTP-131 and Szeto-Schiller peptide. A research listing may use either name; the CAS number and sequence should match the same record.
What SS-31 vials does peptide.prof list?: SS-31 is listed as a 10 mg lyophilized powder vial, one vial per pack, sold as a 1 pack, 2 pack, or 6 pack. It is a vial listing, not a pen. Research use only.
How much does SS-31 cost on peptide.prof?: At the time of writing, the SS-31 product page shows 1 pack at $65, the 2 pack at $61 each, and the 6 pack at $57 each. The live buy box on the product page is the source of truth for price and stock.
Where can I buy SS-31 peptide for research?: peptide.prof lists SS-31 10 mg lyophilized research vials on its SS-31 product page, paid by Venmo or crypto and shipped to a US address after payment. Research use only.
Does peptide.prof give SS-31 dosing or reconstitution instructions?: No. peptide.prof sells laboratory research material only. Not for human or veterinary use. The site does not publish dose, administration, or reconstitution instructions.

Research use only. Not for human or veterinary use. No dose or administration instructions on this site. Chemical identity data from PubChem (CID 11764719), checked November 9, 2026. Prices and stock: live product pages.