Where to Buy PE-22-28 for Laboratory Research
Researchers looking to buy PE-22-28 for laboratory use should evaluate suppliers on four things: where the peptide is actually synthesized, purity documentation, endotoxin and identity testing, and shipping/cold-chain handling. PX1 Research supplies PE-22-28 that is made in America from raw material to finished vial, with 100% domestic synthesis, packaging and shipping.
What to look for in a PE-22-28 supplier
Not every seller listing PE-22-28 actually synthesizes it. Many resell imported bulk peptide that has been re-vialed domestically. A defensible supplier discloses where synthesis happens, publishes third-party purity and identity data, and provides a batch-specific certificate of analysis (COA) for the exact lot shipping to your bench.
At minimum, ask any PE-22-28 supplier for: (1) HPLC purity ≥99%, (2) mass-spec identity confirmation, (3) net peptide content by nitrogen analysis, (4) endotoxin (LAL) screening, and (5) a same-lot COA — not a generic template.
Purity, identity and endotoxin standards for PE-22-28
Independent ISO 17025 lab testing confirms ≥99% purity on every lot, with HPLC and mass-spec COAs available.
PE-22-28 is verified by HPLC-UV for purity, LC-MS or MALDI-TOF for identity, and LAL for endotoxin. Every PX1 batch of PE-22-28 ships with a COA documenting these results against a signed batch record. See our published purity and endotoxin reports for representative documentation.
USA-synthesized PE-22-28 vs imported
Overseas PE-22-28 typically arrives as bulk lyophilized powder that is re-packaged in the U.S. under a distributor's label. That breaks the chain of custody: the reseller can't audit the original synthesis, and lot-to-lot consistency depends on a factory the reseller doesn't operate. PX1's PE-22-28 is made in America from raw material to finished vial, with 100% domestic synthesis, packaging and shipping — synthesis, testing and vial filling all happen in-house.
Shipping, storage and reship policy
PE-22-28 orders placed before the daily cutoff ship the same or next business day from our U.S. facilities via tracked domestic carriers. Cold-chain packaging is used where required. If a shipment is delayed or damaged in transit, PX1 reships at no cost.
Research context for PE-22-28
As a research peptide, PE-22-28 is supplied as a research-grade compound for in-vitro and laboratory investigation. All material is sold strictly for laboratory and research use only — not for human or veterinary use, diagnosis or treatment.
Buy PE-22-28 at wholesale
Clinics, telehealth platforms and research groups can order PE-22-28 at wholesale pricing with custom labeling and branded COAs. Minimum wholesale order is 100 vials per SKU. See the wholesale store for current per-vial pricing.
Frequently Asked Questions
Where is the safest place to buy PE-22-28?
The safest PE-22-28 supplier is one that publishes per-lot COA, HPLC purity and endotoxin data and synthesizes in the U.S. under a signed batch record. PX1 Research meets all four criteria.
Is your PE-22-28 really made in the USA?
Yes. PX1's PE-22-28 is made in America from raw material to finished vial, with 100% domestic synthesis, packaging and shipping. We do not import lyophilized bulk and re-label it.
What purity should I expect from PE-22-28?
≥99% HPLC purity, with identity confirmed by mass spectrometry and endotoxin screened by LAL. Every batch ships with the supporting COA.
Can I buy PE-22-28 in bulk?
Yes — wholesale PE-22-28 is available with custom labeling and branded COAs. Minimum wholesale order is 100 vials per SKU.
How fast does PE-22-28 ship?
Same or next business day for orders placed before the daily cutoff, from our U.S. fulfillment center.
Related pages
All products are sold strictly for laboratory and research use only. Not for human or veterinary use, diagnosis, treatment or consumption. Statements have not been evaluated by the FDA.