RTPeptide

N/C-terminal capping (acetylation, amidation), phosphorylation, biotinylation, fluorescent labelling (FITC, FAM, Cy3, Cy5), PEGylation, cyclisation via disulfide or lactam bridge, and stable isotope labelling (13C, 15N, D) for quantitative proteomics.

Formulation development, custom packaging and labelling, regulatory documentation (MSDS, COA, specification sheets) and worldwide logistics. A tailored proposal is usually ready within 24 hours of the first call.

We supply the technical dossier — specifications, analytical methods, stability data and manufacturing statements — that most registration pathways require. Local filing is handled by you or your regulatory agent.

Catalog peptides start at 1 mg and custom synthesis projects at 5 mg. OEM private label MOQ is negotiable and depends on product type and complexity — we run both small research batches and full commercial production.

Send the sequence, quantity and purity requirement through the inquiry form or WhatsApp. You receive a written quotation with lead time, and production starts once the quotation and payment terms are confirmed.

Bank transfer (T/T) for most orders, with alternative arrangements available for established accounts. Pricing depends on sequence length, modification, purity grade and scale — every quotation is itemised.

Yes. Repeat batches of a validated sequence and multi-kilogram scale orders are priced on a tiered schedule. Long-term supply agreements can also fix pricing across a defined period.

Yes. Every batch ships with a full COA covering HPLC purity (≥98% standard grade, ≥99% research grade), mass spectrometry confirmation and amino acid analysis where applicable. COAs are also searchable on this site by product or lot number.

Yes. Production is ISO 9001:2015 certified and operates under GMP guidelines, with regular third-party audits and full batch traceability. GMP-grade material is available for pharmaceutical and clinical programmes.

Peptides are lyophilised and vacuum-sealed in amber glass vials, packed with desiccant and cold packs (dry ice where required). We ship worldwide via DHL, FedEx and UPS with tracking, and provide import documentation on request.

Store lyophilised peptides at −20 °C, desiccated and protected from light. Once reconstituted, aliquot and hold at −80 °C to avoid freeze-thaw degradation. Most peptides remain stable for two years or more when stored correctly.