Frequently Asked Questions

Research peptides are synthetic chains of amino acids produced for use in controlled, in-vitro laboratory settings. They are manufactured using Solid-Phase Peptide Synthesis (SPPS), a process in which amino acids are added one at a time to a resin-anchored growing chain under controlled chemical conditions. The completed chain is cleaved from the resin, purified by HPLC to remove synthesis by-products, and lyophilized into a stable dry powder. All compounds we supply are SPPS-synthesized, independently HPLC-verified, and dispatched with a batch-specific Certificate of Analysis.

No. Our vials contain pure lyophilized peptide only. No mannitol, excipients, or bulking agents are added. Some suppliers incorporate mannitol to improve the visual appearance of the lyophilized cake, which effectively dilutes the stated quantity and introduces variables into research protocols. What is stated on our vial labels is the actual verified peptide content.

Lyophilized peptides are extremely low-density powders. A 5 mg quantity may be barely visible as a thin film or fine residue at the bottom of the vial. This is normal and does not indicate an underfill. The quantity printed on the vial label reflects the actual peptide content verified by gravimetric analysis during quality control, cross-referenced against the batch COA.

No. We supply single-compound peptides only. Blended or pre-mixed formulations cannot be independently verified for the gravimetric accuracy of each individual component, making reliable quality assurance impossible. Every product in our catalog is a single compound with its own batch-specific COA.

Available sizes vary by compound. Most peptides are offered in 2 mg, 5 mg, and 10 mg options. Select compounds are available in larger formats for institutional procurement. Each product page lists all available sizes with corresponding pricing.

When stored correctly, lyophilized peptides are stable for 24 months or longer from the date of manufacture. The expiry date is printed on every vial label alongside the batch number. Once reconstituted in a laboratory diluent appropriate for your protocol, prepare only the volume required for your assay and store as specified by your institutional reagent handling guidelines.

Store in a cool, dry location away from direct light and moisture. Refrigeration at 2 to 8 degrees Celsius is adequate for most compounds. Peptides with disulfide bonds, complex sequences, or extended storage periods benefit from freezer storage at -20 degrees Celsius. Keep vials sealed until use and avoid repeated thermal cycling.

Yes. We stock Reconstitution Solution (sterile water with 0.9% benzyl alcohol) and acetic acid solution as ancillary reagents available to add to your order. Reconstitution Solution is one of several diluents used in peptide research; the appropriate diluent depends on the compound and the assay conditions. Consult your protocol for guidance on diluent selection.

Most peptides dissolve fully in aqueous buffer. If cloudiness persists after gentle swirling, allow the vial to stand for 15 to 30 minutes and swirl again. Peptides with high hydrophobic content may require initial dissolution in a small volume of DMSO or dilute acetic acid (0.1%) before aqueous dilution. Do not heat or shake vigorously. Contact us if the issue persists.

Research peptides are not controlled substances under the Controlled Substances Act (CSA) and are legal to purchase in the United States for in-vitro laboratory research purposes. They are not approved drugs and are not licensed for human or veterinary use by the FDA. Purchasers are responsible for ensuring their use complies with all applicable federal, state, and local regulations. Purchasing for any purpose other than in-vitro research is not permitted.

We do not offer custom synthesis as a standard service. Our catalog covers the most widely studied peptide compounds. If you require a compound not currently listed, contact us and we can advise on availability and lead times.

No minimum order value applies. You can purchase a single vial.

General reconstitution guidance is available via our peptide calculator and on this FAQ page. We are not able to provide dosing protocols, research methodologies, or advice on compound selection for specific experimental applications. All compounds are sold exclusively for in-vitro laboratory use.

Yes. Several vials of the same compound take 5% off at 3 vials, 10% at 5 and 15% at 10, applied automatically in the cart and at checkout. Institutional and wholesale pricing is available on request for verified research organizations.

Yes. Every compound we stock has a batch-specific Certificate of Analysis produced by an independent, accredited third-party laboratory. The COA includes the compound name, lot number, molecular weight, HPLC purity percentage, and mass spectrometry identity confirmation. Where a lot is on file, the COA is published on that product page; every document we hold is searchable in our COA database using your order number or batch lot number. If a compound has no lot published yet, request it and we will supply the batch profile.

All HPLC purity analysis and mass spectrometry identity confirmation is performed by an independent, accredited third-party laboratory. We do not publish in-house test results. A supplier who tests their own products has a direct financial interest in the outcome. Removing that conflict is the foundation of our QC process. The name and accreditation details of our testing laboratory are available on request for institutional records.

We accept batches at a minimum of 99.0% purity by HPLC. Any batch that tests below this threshold is rejected and not dispatched. Most batches test above 99.4%. The exact purity figure for every lot is stated on the batch-specific COA.

The most frequently occurring impurities in SPPS-synthesized peptides are truncated sequences (chains where synthesis terminated early), deletion sequences (chains missing one or more amino acids), and oxidation by-products. HPLC separates these from the target compound and quantifies their relative proportion. MS-UPLC is used alongside HPLC to confirm that the dominant peak matches the correct molecular weight for the stated sequence.

Purity is the proportion of the target peptide within the sample, expressed as a percentage of the total measurable content by HPLC. Peptide content refers to the absolute mass of peptide in a vial as stated on the label. A vial labeled 5 mg at >99% purity contains approximately 4.95 mg of the target compound and less than 0.05 mg of quantifiable impurities. We verify both the label quantity gravimetrically and the purity analytically.

Endotoxin testing is not part of our standard QC process, as compounds are intended for in-vitro use only. If your research application requires endotoxin-tested material, contact us before ordering to discuss whether this can be accommodated.

We accept payment by credit or debit card, cryptocurrency, and bank transfer. Card and cryptocurrency payments are processed securely through our payment partners; card details are never stored on our servers. Bank transfer instructions are provided at checkout.

Orders are processed the next business day after payment is confirmed. You will receive an order confirmation email immediately after purchase and a dispatch notification with tracking information once the order ships.

Confirmation emails are sent automatically at the point of purchase. Check your spam or junk folder first. If it is not there, log into your account and check your order history. If the order is showing but no email was received, contact us and we will resend it.

Amendments can only be made before the order is dispatched. Contact us as quickly as possible via the contact page with your order number and the required changes. Once a dispatch notification has been sent, we are unable to amend the order.

We accept returns of unopened, unused products in original condition within 14 days of delivery. Opened vials cannot be returned due to the nature of the product. See the Refund Policy page for the full process, exclusions, and how to initiate a return.

Yes. We work with a select number of verified research institutions and procurement organizations. Contact us directly to discuss wholesale pricing, volume terms, and documentation requirements.

We ship via USPS Priority Mail (2 to 3 business days) and USPS Priority Mail Express (next business day) for time-sensitive orders. Both options are available at checkout. All orders include cold-chain packaging at no additional charge.

Orders confirmed before 12pm EST are dispatched the same business day. Orders confirmed after 12pm EST, or placed on weekends or federal holidays, are dispatched the next business day.

USPS Priority Mail typically delivers within 2 to 3 business days. USPS Priority Mail Express delivers the next business day when ordered before our 12pm EST cutoff. Delivery estimates are not guarantees except for USPS Priority Mail Express.

All orders ship in plain, unmarked outer packaging with no product names, compound identifiers, or company branding visible on the exterior. Vials are secured in protective foam inserts. All orders include thermal insulation and cold packs to maintain temperature integrity throughout transit.

Allow one additional business day beyond the estimated delivery window before contacting us, as carriers occasionally experience delays. If the order still has not arrived, contact us with your order number and we will open an investigation with the carrier.

Check with anyone at your address and look in any secure locations a carrier may have used. If the parcel cannot be located, contact us within 5 days of the delivery scan. We will open a carrier investigation. Note that carriers may require a signed declaration before a claim can be processed.

Contact us immediately if you notice an address error. If the order has not yet shipped, we can update the address. If it has already been dispatched, we are unable to redirect the parcel in transit. The order would need to be returned to us before a replacement can be sent.

Yes. Both USPS Priority Mail and USPS Priority Mail Express can deliver to PO Box addresses. Contact us if you have questions about delivery options for your location.

Contact us within 48 hours of delivery with your order number and photographs of the outer packaging and affected items. Do not discard any damaged packaging before contacting us, as it may be required for a carrier claim. We will arrange a replacement or refund depending on the extent of the damage.

If your parcel has not arrived within 5 business days of your dispatch notification, contact us with your order number and we will open a carrier investigation. Carriers typically require up to 10 business days to confirm a parcel as lost. Once confirmed, we will arrange a replacement shipment or issue a refund.

Carrier investigations are required before a lost parcel claim can be filed. Processing a replacement before the investigation concludes risks sending a duplicate if the parcel is located and delivered shortly after. We raise investigations promptly and will action a resolution as soon as the carrier confirms an outcome.

Check with other occupants at your address and any secure delivery locations. If the parcel cannot be found, contact us within 5 days of the delivery scan. We will raise a carrier investigation. Some carriers require a signed declaration from the recipient before processing a missing parcel claim.

Contact us via the contact page before sending anything back. Unauthorized returns cannot be processed. Once a return is authorized, we will provide the returns address and any packaging requirements. Returns are accepted within 14 days of delivery for unopened, unused products in original condition only.

Check your spam or junk folder first. If the email is not there, log into your account and check your order history to confirm the order was placed. If the order is showing in your account history but no confirmation email was received, contact us and we will resend it.

Use the password reset link on the sign-in page. Enter your registered email address and a reset link will be sent within a few minutes. If you do not receive it, check spam. If you continue to have difficulty, contact us with the email address associated with your account.

Address changes can only be made before the order is dispatched. Contact us as soon as possible with your order number and the correct address. If the order has already shipped, we are unable to redirect it in transit.

Log into your account and navigate to account settings to update your name, email address, or saved delivery addresses. If you need to change the email address linked to your account and cannot log in, contact us for assistance.

Use the contact form on the Contact page. We respond to all order and research enquiries within 1 business day. We are not able to provide dosing, clinical, or medical advice of any kind.