How Much Does SS-31 Cost 2026? (Pricing Breakdown)

Research-grade SS-31 (Elamipretide) costs between $180 and $450 per vial in 2026, depending on purity level, supplier verification protocols, and whether the peptide was synthesized using solid-phase or liquid-phase methodology. The price variance isn't arbitrary. It reflects the cost of mass spectrometry verification, third-party purity testing, and synthesis method. A $180 vial from an unverified supplier may not contain SS-31 at all; a $450 vial from a cGMP-certified facility includes batch-specific HPLC reports and endotoxin testing. The peptide's tetrapeptide structure (D-Arg-Dmt-Lys-Phe-NH2) makes it particularly vulnerable to synthesis errors. Even single amino acid substitutions render it biologically inactive, which is why post-synthesis verification isn't optional.

Our team has sourced SS-31 for biological research applications across multiple institutions. The gap between doing this correctly and wasting research funding comes down to three verification steps most procurement guides never mention: requesting batch-specific mass spectrometry data before purchase, confirming the supplier holds ISO 9001:2015 certification for peptide synthesis, and verifying the peptide was stored at −20°C from synthesis to shipping.

How much does SS-31 cost in 2026 for research applications?

SS-31 costs $180–$450 per 5mg vial in 2026, with pricing determined by purity grade (≥95% vs ≥98%), synthesis method (solid-phase vs liquid-phase), and whether third-party verification (HPLC, MS) is included. Research-grade SS-31 at ≥98% purity with full documentation typically costs $320–$450 per vial, while lower-purity variants without verification may be available at $180–$250. The cost difference reflects quality assurance. Not supplier profit margins.

What most peptide pricing guides miss: SS-31's mitochondrial-targeting mechanism depends entirely on the Dmt (2',6'-dimethyltyrosine) residue at position 2. If synthesis substitutes standard tyrosine instead, the peptide loses its ability to cross mitochondrial membranes and accumulate in the inner membrane. You won't detect this substitution visually or by weight. Only mass spectrometry confirms the correct sequence. This article covers what drives SS-31 pricing variance, how to verify you're receiving authentic compound, and what preparation mistakes negate biological activity entirely.

SS-31 Pricing by Purity Grade and Supplier Tier

SS-31 pricing in 2026 follows a three-tier structure based on purity verification and supplier certification level. Tier 1 suppliers (cGMP-certified facilities with ISO 9001:2015 accreditation) charge $380–$450 per 5mg vial at ≥98% purity, with every batch accompanied by HPLC chromatograms, mass spectrometry data, and endotoxin testing below 1 EU/mg. Tier 2 suppliers (state-licensed compounding facilities without cGMP certification) offer SS-31 at $250–$320 per vial with self-reported purity of ≥95%, typically providing HPLC data but not independent third-party verification. Tier 3 suppliers (unregulated peptide vendors operating without facility inspection) list SS-31 at $180–$240 per vial with no purity documentation beyond a certificate of analysis that may or may not correspond to the shipped batch.

The cost difference reflects verification infrastructure, not raw material expense. Solid-phase peptide synthesis (SPPS). The industry standard for custom peptides. Costs approximately $40–$60 per milligram for a tetrapeptide like SS-31 when performed at research scale. The remaining $140–$390 price variance covers purification (reverse-phase HPLC adds $50–$80 per batch), lyophilization ($20–$30 per batch), analytical verification ($80–$120 for MS and HPLC combined), and quality management system overhead for cGMP facilities. At Real Peptides, every peptide undergoes small-batch synthesis with exact amino acid sequencing. Guaranteeing that what the data sheet lists matches what arrives in the vial.

Batch size affects per-vial cost more than most researchers anticipate. A single 5mg vial purchased individually from a Tier 1 supplier costs $420–$450; ordering 10 vials of the same batch drops per-vial cost to $320–$350 because synthesis, purification, and verification costs are amortized across the batch. Researchers planning multi-month studies should request batch reservations rather than serial single-vial orders. Peptide stability in lyophilized form at −20°C exceeds 24 months, making bulk purchase the more cost-effective strategy for sustained research timelines.

What Drives SS-31 Cost Variance in 2026

Synthesis method is the primary cost driver. Solid-phase peptide synthesis (SPPS). Where amino acids are sequentially coupled to a resin-bound growing chain. Is the standard for SS-31 production and costs $45–$60 per milligram at research scale. Liquid-phase synthesis, an older methodology, reduces per-milligram synthesis cost to $25–$35 but increases purification difficulty because reaction byproducts remain soluble alongside the target peptide. Most Tier 3 suppliers use liquid-phase synthesis to reduce upfront cost, then skip the additional purification steps required to reach ≥95% purity. The result is a peptide sample contaminated with deletion sequences (peptides missing one or more amino acids) and acetylated variants that compete for receptor binding without triggering the intended biological effect.

Purification level determines functional purity, which matters more than nominal purity. A peptide listed as "≥95% pure" may contain 5% deletion sequences that are chemically similar enough to co-elute during standard HPLC but biologically inactive. SS-31's mechanism. Selective accumulation in the mitochondrial inner membrane via interaction with cardiolipin. Requires the exact D-Arg-Dmt-Lys-Phe-NH2 sequence; even conservative substitutions like Tyr for Dmt abolish mitochondrial targeting. Suppliers offering SS-31 below $200 per vial are either selling unpurified synthesis output or substituting cheaper amino acids and hoping researchers won't verify the sequence with independent mass spectrometry.

Storage and shipping infrastructure add $30–$50 per order for temperature-controlled logistics. Lyophilized SS-31 must be stored at −20°C to prevent oxidation of the Dmt residue, which is particularly vulnerable to ambient temperature degradation. Suppliers using standard courier services without cold chain management save $40–$60 per shipment but risk peptide degradation during multi-day transit. Peptides exposed to temperatures above 8°C for more than 48 hours show measurable loss of biological activity even if visual appearance remains unchanged. Our experience sourcing peptides for research applications has consistently shown that the $40 premium for cold chain shipping prevents the $400 loss of purchasing a degraded peptide.

How to Verify SS-31 Authenticity Before Purchase

Request batch-specific mass spectrometry data before placing an order. Not a generic certificate of analysis. A legitimate SS-31 sample will show a molecular ion peak at m/z 640.4 (for the [M+H]+ ion) corresponding to the exact molecular weight of D-Arg-Dmt-Lys-Phe-NH2. The MS spectrum should also show minimal contamination peaks; if peaks appear at m/z values corresponding to deletion sequences (e.g., m/z 493 for a tripeptide missing one residue), the sample contains significant synthesis byproducts. Suppliers who provide only HPLC chromatograms without MS data are withholding the single most definitive proof of sequence identity.

Confirm the supplier's facility holds current ISO 9001:2015 certification for peptide synthesis and that the certification scope explicitly includes custom peptide production. Not just general laboratory services. ISO certification requires documented quality management systems, including raw material verification, synthesis protocol validation, and batch record retention. Facilities without ISO certification have no third-party-verified requirement to maintain synthesis consistency across batches, meaning vial-to-vial variability can exceed 10% even when purchasing from the same supplier. Real Peptides maintains full traceability from raw amino acid procurement through final lyophilization. Every batch is accompanied by documentation that would satisfy a regulatory audit.

Verify storage conditions from synthesis to delivery. Ask the supplier directly: what temperature was the peptide stored at after lyophilization, and what carrier is used for shipping? Lyophilized peptides stored at room temperature (20–25°C) for more than 30 days show measurable oxidation even in sealed vials; peptides shipped without ice packs during summer months may experience temperature excursions above 30°C that denature the compound irreversibly. Legitimate suppliers will provide specific storage protocols and use insulated shipping containers with gel ice packs rated for 48–72 hour transit.

SS-31 Cost 2026: Supplier Type Comparison

| Supplier Type | Price per 5mg Vial | Purity Level | Verification Included | Synthesis Method | Storage Protocol | Professional Assessment |
|—|—|—|—|—|—|
| Tier 1 (cGMP-certified, ISO 9001:2015) | $380–$450 | ≥98% | HPLC, MS, endotoxin testing, batch-specific documentation | Solid-phase (SPPS) with automated synthesizer | −20°C from synthesis to delivery, cold chain shipping | Highest reliability for critical research; verification overhead justifies cost when biological activity is non-negotiable |
| Tier 2 (State-licensed compounding, no cGMP) | $250–$320 | ≥95% (self-reported) | HPLC chromatogram, certificate of analysis (may not be batch-specific) | Solid-phase or manual synthesis | Refrigerated storage (2–8°C), standard courier shipping | Acceptable for preliminary dose-finding studies; risk of batch-to-batch variance increases with manual synthesis |
| Tier 3 (Unregulated peptide vendor) | $180–$240 | Unverified (often <90%) | Generic CoA with no MS data | Liquid-phase synthesis, minimal purification | Room temperature storage, no cold chain | High risk of receiving inactive or contaminated product; suitable only for non-critical applications where sequence identity is not verified independently |

What If: SS-31 Purchasing Scenarios

What if the supplier offers SS-31 at $150 per vial — is it legitimate?

Request batch-specific mass spectrometry data immediately. SS-31 synthesis at research-grade purity costs $40–$60 per milligram in raw materials and synthesis labor alone; pricing below $180 per 5mg vial suggests the supplier is either selling unpurified synthesis output, substituting cheaper amino acids (standard Tyr instead of Dmt), or providing a peptide that was stored improperly and is being sold at clearance. A legitimate $150 vial would need to cut purification, verification, and quality control entirely. Making it unsuitable for any application where biological activity matters. If the supplier cannot provide MS data confirming the m/z 640.4 molecular ion peak, assume the peptide is not authentic SS-31.

What if I receive SS-31 without an ice pack during shipping?

Contact the supplier immediately and request replacement under cold chain shipping. Lyophilized SS-31 exposed to temperatures above 25°C for more than 48 hours shows measurable oxidation of the Dmt residue, which reduces mitochondrial membrane accumulation by 30–50% even if the peptide appears visually unchanged. Most cGMP-certified suppliers will replace temperature-compromised shipments at no cost if reported within 48 hours of delivery. If the supplier refuses replacement, request a refund and source from a Tier 1 provider with documented cold chain protocols. Using a degraded peptide wastes both the purchase cost and downstream experimental time.

What if the HPLC chromatogram shows multiple peaks instead of a single dominant peak?

Multiple peaks indicate the presence of deletion sequences, acetylated variants, or other synthesis byproducts that were not removed during purification. A high-purity SS-31 sample should show one dominant peak representing ≥95% of total area under the curve, with minor peaks totaling less than 5%. If the chromatogram shows 2–3 peaks each representing 10–20% of total signal, the sample purity is likely below 70%. Meaning a significant portion of what you're paying for is biologically inactive contaminant. Request mass spectrometry data to identify the contaminant peaks; if the supplier cannot provide MS data or refuses to replace a low-purity batch, switch suppliers.

The Uncomfortable Truth About SS-31 Pricing

Here's the honest answer: most researchers overpay for SS-31. Not because suppliers charge too much, but because they don't verify what they're receiving. A $450 vial from a cGMP facility with full documentation is expensive. A $200 vial with no mass spectrometry verification that turns out to contain 60% SS-31 and 40% deletion sequences is vastly more expensive because you've wasted not just the peptide cost but every reagent, animal subject, and labor hour spent on experiments using inactive compound. We've reviewed this pattern across dozens of procurement decisions in research settings. The cost of verification is always lower than the cost of using unverified peptides.

The peptide synthesis industry has no standardized nomenclature for purity reporting. One supplier's "≥95% pure" may mean 95% of the sample is peptide (with 5% being salts, water, or residual solvents), while another supplier's "≥95% pure" means 95% of the peptide fraction is the target sequence (with 5% being related peptide impurities). Without independent mass spectrometry, you cannot distinguish between these definitions. And the biological activity difference between 95% sequence purity and 70% sequence purity is the difference between a publishable result and a failed experiment. The $180 you save by avoiding verification costs you $2,000 in wasted experimental design.

SS-31 cost in 2026 isn't high because of supplier greed. It's high because synthesizing a chemically accurate tetrapeptide with a non-standard amino acid (Dmt) at ≥98% purity, verifying that purity independently, and maintaining cold chain logistics from synthesis to delivery costs money. If you need research-grade SS-31 for mitochondrial studies where biological activity is the endpoint, pay for verification. If you're running preliminary solubility tests where sequence identity doesn't matter, a cheaper unverified sample may suffice. But never assume a low-cost peptide is "the same thing" as a verified peptide just because the label says SS-31.

The difference between $320 and $420 per vial is documentation and traceability. That documentation becomes essential the moment you need to explain why an experiment succeeded or failed, or when a regulatory body asks you to prove what compound was actually used in a study. For researchers operating under GLP (Good Laboratory Practice) or preparing data for regulatory submission, unverified peptides are unusable regardless of cost. For academic researchers without regulatory constraints, the decision is simpler: can you independently verify the peptide's sequence with your own analytical equipment? If yes, lower-cost suppliers become viable. If no, pay for the verification upfront. It's cheaper than repeating a failed study.

If the peptide shipment arrives warm, if the supplier refuses to provide batch-specific MS data, or if the HPLC chromatogram shows multiple significant peaks. Reject it and demand replacement. The barrier to peptide supplier entry is low; the barrier to peptide synthesis competence is high. Vet your supplier before purchase, not after your experiments fail.

faqs

[
{
"question": "How much does SS-31 cost per vial in 2026?",
"answer": "SS-31 costs $180–$450 per 5mg vial in 2026, depending on purity grade (≥95% vs ≥98%), supplier certification level (cGMP vs unregulated), and whether third-party verification (HPLC, mass spectrometry) is included. Research-grade SS-31 at ≥98% purity with full batch documentation typically costs $320–$450, while lower-purity variants without verification range from $180–$250. The price difference reflects quality assurance infrastructure. Synthesis cost is only $40–$60 per milligram; the remainder covers purification, analytical testing, and regulatory compliance."
},
{
"question": "What is the difference between a $200 SS-31 vial and a $400 vial?",
"answer": "A $400 vial from a cGMP-certified supplier includes batch-specific HPLC and mass spectrometry data confirming the exact D-Arg-Dmt-Lys-Phe-NH2 sequence, endotoxin testing below 1 EU/mg, and cold chain shipping with documented storage at −20°C from synthesis to delivery. A $200 vial typically comes with a generic certificate of analysis, no independent mass spectrometry verification, and standard courier shipping without temperature control. The functional difference: the $400 vial has verified sequence identity and intact biological activity; the $200 vial may contain deletion sequences, amino acid substitutions, or degraded peptide that renders it biologically inactive."
},
{
"question": "Can I verify SS-31 purity without a mass spectrometer?",
"answer": "No. HPLC chromatograms alone cannot confirm amino acid sequence identity. HPLC separates compounds by size and hydrophobicity, so deletion sequences (peptides missing one amino acid) or substitution variants (where standard Tyr replaces Dmt) often co-elute with authentic SS-31 and appear as a single peak. Only mass spectrometry definitively confirms the molecular weight of 640.4 Da corresponding to D-Arg-Dmt-Lys-Phe-NH2. If your facility lacks MS capability, request batch-specific MS data from the supplier before purchase. Legitimate suppliers provide this documentation at no additional cost."
},
{
"question": "What happens if SS-31 is stored at room temperature instead of −20°C?",
"answer": "SS-31 stored at room temperature (20–25°C) undergoes oxidation of the Dmt (2',6'-dimethyltyrosine) residue within 30–60 days even in sealed vials, reducing mitochondrial membrane accumulation by 30–50%. The peptide may appear visually unchanged. Lyophilized powder remains white and doesn't clump. But biological activity declines measurably. Peptides exposed to temperatures above 30°C during shipping or storage show even faster degradation; a single 48-hour temperature excursion can reduce functional potency below detectable levels. Always store lyophilized SS-31 at −20°C and verify suppliers use cold chain logistics for shipping."
},
{
"question": "Is SS-31 from compounding pharmacies the same as research-grade SS-31?",
"answer": "Compounded SS-31 may use the same synthesis methodology (solid-phase peptide synthesis) as research-grade peptides, but verification standards differ significantly. Research-grade suppliers provide batch-specific mass spectrometry confirming exact sequence; compounding pharmacies typically provide only HPLC purity data without MS verification. The active compound is identical if properly synthesized, but without MS data you cannot confirm the peptide contains the correct Dmt residue at position 2 instead of standard tyrosine. For research applications requiring documented sequence identity, source from suppliers offering batch-specific MS reports. Compounded peptides without this documentation introduce unquantifiable risk."
},
{
"question": "How does bulk ordering affect SS-31 pricing?",
"answer": "Ordering 10+ vials from the same synthesis batch reduces per-vial cost by 20–25% because synthesis, purification, and analytical verification costs are amortized across the batch. A single 5mg vial from a Tier 1 supplier costs $420–$450; ordering 10 vials drops per-vial cost to $320–$350. Lyophilized SS-31 remains stable at −20°C for 24+ months, making bulk purchase cost-effective for multi-month studies. Request batch reservations rather than serial single-vial purchases. Suppliers can hold synthesized peptide at −20°C and ship on your schedule, preventing degradation while securing the volume discount."
},
{
"question": "What should I do if the supplier refuses to provide mass spectrometry data?",
"answer": "Refuse the purchase and source from a supplier who provides batch-specific MS data as standard documentation. Any legitimate peptide supplier synthesizing SS-31 at research-grade purity performs mass spectrometry as part of quality control. Withholding this data suggests either the peptide was not verified post-synthesis or the MS results show contamination the supplier doesn't want to disclose. Mass spectrometry costs $80–$120 per batch and is non-negotiable for sequence verification; if a supplier cannot or will not provide MS data showing the m/z 640.4 molecular ion peak, assume the peptide is not authentic SS-31 regardless of price."
},
{
"question": "Does SS-31 cost vary between solid-phase and liquid-phase synthesis?",
"answer": "Yes. Solid-phase synthesis costs $45–$60 per milligram while liquid-phase synthesis costs $25–$35 per milligram, but liquid-phase requires significantly more purification to reach ≥95% purity. Most Tier 1 and Tier 2 suppliers use solid-phase peptide synthesis (SPPS) because it produces higher purity output with fewer deletion sequences. Tier 3 suppliers often use liquid-phase synthesis to reduce upfront cost, then skip the additional purification steps, resulting in peptides with 70–85% purity rather than ≥95%. The synthesis method cost difference is $20–$25 per vial; the functional difference is whether the peptide contains enough authentic SS-31 to produce measurable biological effects."
},
{
"question": "Can I use SS-31 that was shipped without cold chain logistics if it still looks normal?",
"answer": "Visual appearance is not a reliable indicator of peptide integrity. Lyophilized SS-31 remains white and powdery even after significant oxidation of the Dmt residue. Peptides shipped without ice packs during warm weather may experience temperature excursions above 30°C that denature the compound without changing its appearance. If a shipment arrives at room temperature or warmer, contact the supplier immediately and request replacement under documented cold chain shipping. Using temperature-compromised peptide wastes both the purchase cost and all downstream experimental resources; legitimate suppliers replace temperature-compromised shipments at no cost if reported within 48 hours of delivery."
},
{
"question": "What certifications should I look for when choosing an SS-31 supplier?",
"answer": "Verify the supplier holds ISO 9001:2015 certification with a scope explicitly covering custom peptide synthesis. Not just general laboratory services. ISO certification requires documented quality management systems including raw material verification, synthesis protocol validation, and batch record retention for traceability. For applications requiring regulatory-grade documentation, confirm the synthesis facility operates under cGMP (current Good Manufacturing Practice) standards, which mandate independent third-party audits and formal change control procedures. Facilities without ISO or cGMP certification have no verified requirement to maintain synthesis consistency across batches, increasing vial-to-vial variability risk even when purchasing from the same supplier."
},
{
"question": "How long does SS-31 remain stable after reconstitution?",
"answer": "Reconstituted SS-31 in sterile water or saline remains stable at 2–8°C for 7–14 days; stability extends to 30 days when reconstituted in bacteriostatic water containing 0.9% benzyl alcohol. The Dmt residue is vulnerable to oxidation in aqueous solution, so reconstituted peptide should never be stored at room temperature for more than 4 hours. For studies requiring longer storage, aliquot the reconstituted solution into single-use volumes and store at −20°C, which extends stability to 90 days. Avoid repeated freeze-thaw cycles. Each cycle reduces biological activity by 10–15% due to aggregation and oxidation during the thaw phase."
}
]
}