BPC & Thymosin Peptides

CAS736992-21-5

FormulaC32H49N9O5

Mol. weight639.78 Da

Quantity50mg/vial

Purity99.1% HPLC

IdentityConfirmed

ReportBy email on request

StockIn stock

SS-31 50mg

Name: SS-31 50mg
Brand: Pepta Labs
SKU: ss-31-50mg
Price: 213.31 USD
Availability: InStock

Elamipretide, MTP-131, Szeto-Schiller peptide 31, RX-31, D-Arg-Dmt-Lys-Phe-NH2 · CAS 736992-21-5

SS-31 50mg is Pepta Labs' listing for one sealed glass vial holding 50 mg of SS-31 as lyophilized (freeze-dried) powder, the quantity stated by the supplier. It is the larger of the two SS-31 sizes Pepta Labs lists; the other is a 25 mg vial of the same compound. To see the HPLC purity and mass-spectrometry identity report first, request it on this page or email support@peptalabs.com and it is sent by email.

SS-31 50mg: $213.31 per vial ($4.27 per mg of the supplier-stated 50 mg). Ships to US addresses only. SS-31 50mg (Elamipretide) is a lyophilized research peptide supplied as 50mg of dry powder per sealed vial. CAS 736992-21-5; molecular formula C32H49N9O5; molecular weight 639.78 Da. Purity is reported as 99.1% by reversed-phase HPLC and identity is confirmed by mass spectrometry; the analytical report is available by email. Supplied for laboratory research use only.

99.1% pure Identity confirmed

$213.31

$4.27 per mg

Free US shipping · Most orders ship the next business day

Pack size and price

Other quantities of this compound

25mg/vial $119.84 Out of stock

Quantity

Checkout uses a free account with a confirmed email.

Code FALL25: 25% off at checkout.

Free US shipping, no minimum

Most orders ship the next business day as dry powder at ambient temperature. Unopened products in original sealed condition may be returned within 30 days of delivery with return authorization.

Report by email before you order

Independent HPLC purity and MS identity report on request. Pepta Labs does not test in-house.

Payment methods

Pepta Labs accepts Cash App, Venmo, Zelle, Bitcoin and Ethereum (5% crypto discount). Payment instructions are emailed as soon as you place your order.

Research use only

Not for human or animal use. Certified at checkout from a registered account.

Specifications

SS-31 50mg at a glance

SS-31 50mg is supplied as lyophilized powder in a sealed glass vial for laboratory research only. It is not for human or animal use, consumption, administration, diagnosis or treatment.

Full name: Elamipretide
Quantity: 50mg/vial
CAS number: 736992-21-5
Molecular formula: C32H49N9O5
Molecular weight: 639.78 Da
Sequence: H-D-Arg-Dmt-Lys-Phe-NH2 (Dmt = 2',6'-dimethyl-L-tyrosine)
Purity: 99.1% by HPLC
Identity: Confirmed by mass spectrometry
Physical form: Lyophilized (freeze-dried) powder, sealed glass vial
Report: Sent by email on request, before you order if you want to see it first.
Not claimed: Sterility, endotoxin or LAL, potency, pharmaceutical-grade, cGMP, contaminant-panel or vial fill-quantity testing
Category: BPC & Thymosin Peptides

Chemical identity

What SS-31 is

SS-31 is the research code for elamipretide (INN/USAN), also known as MTP-131, RX-31 or Szeto-Schiller peptide 31. It is a synthetic tetrapeptide amide with the sequence D-Arg-Dmt-Lys-Phe-NH2, where Dmt is 2',6'-dimethyl-L-tyrosine, a non-proteinogenic residue; the N-terminal arginine is the D-enantiomer and the C-terminus is a primary amide. The free base has the molecular formula C32H49N9O5 and a molecular weight of 639.78 g/mol (PubChem CID 11764719, CAS 736992-21-5, UNII 87GWG91S09), matching the values on the Pepta Labs listing. Because the molecule carries three basic groups (the arginine guanidine, the lysine epsilon-amine and the N-terminal amine), it is isolated as a multi-counter-ion salt, usually acetate or trifluoroacetate. Pepta Labs supplies SS-31 as a lyophilized powder in sealed glass vials (25 mg and 50 mg quantities) with reported RP-HPLC purity and mass-spectrometric identity. Store at 2-8 C on arrival or at -20 C for long-term storage, protected from light and moisture. Laboratory research use only.

Also known as: Elamipretide, MTP-131, Szeto-Schiller peptide 31, RX-31, D-Arg-Dmt-Lys-Phe-NH2
Structural class: synthetic tetrapeptide amide containing D-arginine and 2',6'-dimethyl-L-tyrosine (Dmt)
Residues: 4 amino acids
Salt form: typically supplied as acetate or trifluoroacetate salt (multiple counter-ions per molecule)
PubChem CID: 11764719
UNII: 87GWG91S09

Handling

Storage, form and restrictions

Shipping: Ships at ambient temperature with no cold pack and no insulated packaging. No cold chain is required for dry powder.
Storage: Refrigerate at 2–8°C on arrival, or hold at −20°C for long-term storage. Keep sealed vials away from light and moisture.
Research use only: Offered solely for laboratory research. Not for human or animal use, consumption, administration, diagnosis or treatment. See the research use policy.

Documentation

Before you order

What are research peptides? SS-31 (Elamipretide, MTP-131): D-Arg-Dmt-Lys-Phe-NH2 Sequence, CAS and Counter-Ions Peptide Sequence Notation: One-Letter and Three-Letter Codes, Termini and Modified Residues All BPC & Thymosin Peptides compounds How to Read a Peptide COA HPLC and Mass Spectrometry Testing and Documentation Research Use Policy

Questions

SS-31 50mg — common questions

Is SS-31 50mg one vial or two 25mg vials?

One vial. The SS-31 50mg listing is a single sealed glass vial containing 50 mg of lyophilized powder, the supplier-stated quantity. The 25 mg size is a separate listing.

What is the difference between SS-31 50mg and SS-31 25mg?

Only the quantity per vial and the price. Both listings are the same compound with the same CAS number, formula and sequence, both are lyophilized powder in a sealed vial, and each page shows its own live price and pack options.

What exactly is in an SS-31 50mg vial?

50 mg of SS-31 as a dry lyophilized powder, as stated by the supplier. That figure is the powder weight of the peptide salt: net peptide content is not reported per listing, no vial fill-quantity testing is claimed, and the vial label carries no lot number.

Can I see the SS-31 50mg analytical report before I buy?

Yes. Request it on this page or email support@peptalabs.com with the compound name and size, and it is sent by email. It shows RP-HPLC purity as area-% and mass spectrometry identity for the sampled production run; it is not a certificate for an individual lot or vial.

How should an unopened SS-31 50mg vial be stored?

Store the sealed vial of dry powder at 2-8 C on arrival, or at -20 C for long-term storage, protected from light and moisture.

Where is SS-31 net peptide content explained?

In the Learn guide How Net Peptide Content Is Determined, with the counter-ion arithmetic in TFA vs Acetate Peptide Salts. For the SS-31 sequence, CAS number and counter-ions, see the Learn guide on SS-31.

What does SS-31 50mg cost?

SS-31 50mg starts at $213.31 per vial. 3-vial packs are 7% off and 5-vial packs are 14% off. US shipping is free with no minimum.

What payment methods are accepted?

Pepta Labs accepts Cash App, Venmo, Zelle, Bitcoin and Ethereum (5% crypto discount). Payment instructions are emailed as soon as you place your order.

Is this for human or animal use?

No. SS-31 50mg is offered solely for laboratory research and is not for human or animal use, consumption, administration, diagnosis or treatment. Buyers certify this at checkout.

Are SS-31, elamipretide and MTP-131 the same compound?

Yes. Elamipretide is the INN/USAN name and SS-31 and MTP-131 are research codes; all refer to D-Arg-Dmt-Lys-Phe-NH2 (C32H49N9O5, 639.8 g/mol, CAS 736992-21-5).

What is Dmt in the SS-31 sequence?

Dmt is 2',6'-dimethyl-L-tyrosine, a tyrosine analogue with two methyl groups on the aromatic ring. It is not one of the 20 standard amino acids, which is why the formula (C32H49N9O5) differs from that of the corresponding Arg-Tyr-Lys-Phe amide by C2H4.

Why does SS-31 carry several counter-ions per molecule?

The peptide has three basic sites (guanidine, epsilon-amine and N-terminal amine) that are protonated in the isolated salt, so acetate or trifluoroacetate salts contain up to three anions per peptide. This raises the salt molecular weight above 639.8 g/mol, so the peptide content is lower than the weight of powder in the vial.

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