Search products
Search the catalog by name or ingredient
Search the catalog by name or ingredient
Research peptide · 5 mg / vial
4.7· 25 reviewsLyophilized P21, ≥98% HPLC purity, supplied with a batch-specific Certificate of Analysis (HPLC + mass spec). Reference material for laboratory research use only — not for human or veterinary use.
Total for 3 items
$86.97
Add 7 more to unlock 20% off
Good to know
No slogans, no “trust us.” Here is the exact path every PepBiotics vial takes before its lot number ever reaches your label.
Solid-phase synthesis, then lyophilized to a stable powder. Each production run becomes a single traceable lot.
Reverse-phase HPLC quantifies purity and resolves impurities — the headline percentage on every certificate.
ESI mass spectrometry confirms the molecular weight matches the target sequence. No guessing what's in the vial.
Lab results
Every lot links to its full Certificate of Analysis from Aegis Bioanalytical Laboratories, an independent ISO/IEC 17025-accredited lab — each with a Report ID you can verify.
Lot PBL-24278
Mfg Jul 12, 2026 · Exp Jul 11, 2028 · Aegis Bioanalytical Laboratories
Lot PBL-24277
Mfg Mar 31, 2026 · Exp Mar 30, 2028 · Aegis Bioanalytical Laboratories
Questions
Reviews
Keep exploring
30-Day Reship Guarantee. If a vial arrives damaged or a lot doesn’t match its COA, we reship or refund — no questions asked.
P21
$18.99
Don’t forget
Bac.water — $18.99
A standard laboratory diluent for lyophilized research materials. Most orders add one.
Every result is signed by Aegis Bioanalytical Laboratories and published to the vault — searchable by the lot number on your label.
4.7
Based on 25 reviews
Third order across two different lots and both COAs line up. Consistency matters more than a headline purity number, and they deliver it.
Ordered the 5-vial bundle — per-vial pricing is fair and the volume discount applied exactly as shown. Smooth checkout.
Lyophilized cake dissolved fully in bacteriostatic water with no cloudiness or residue. Net peptide content on the COA let me hit exact working concentrations.
Being able to look up the certificate by lot number before ordering is the whole reason we switched. Documentation is impeccable.
No issues with the material itself. The label print was slightly faint on one vial but still fully legible.
Ordered the 5-vial bundle — per-vial pricing is fair and the volume discount applied exactly as shown. Smooth checkout.
Ran our own analytical HPLC on the lot and it agreed with the published COA within tolerance. Identity confirmed by MS. This is what a research supplier should be.
Purity and identity were on point. Only nitpick is the vial is a touch small for larger diluent volumes — minor.
Third order across two different lots and both COAs line up. Consistency matters more than a headline purity number, and they deliver it.
Ran our own analytical HPLC on the lot and it agreed with the published COA within tolerance. Identity confirmed by MS. This is what a research supplier should be.
Purity and identity were on point. Only nitpick is the vial is a touch small for larger diluent volumes — minor.
Purity and identity were on point. Only nitpick is the vial is a touch small for larger diluent volumes — minor.
Packaging was discreet and protective, labels crisp, and the lot resolved to a real report in the COA vault. Zero complaints.
Lyophilized cake dissolved fully in bacteriostatic water with no cloudiness or residue. Net peptide content on the COA let me hit exact working concentrations.
Packaging was discreet and protective, labels crisp, and the lot resolved to a real report in the COA vault. Zero complaints.
Third order across two different lots and both COAs line up. Consistency matters more than a headline purity number, and they deliver it.
Ran our own analytical HPLC on the lot and it agreed with the published COA within tolerance. Identity confirmed by MS. This is what a research supplier should be.
Purity and identity were on point. Only nitpick is the vial is a touch small for larger diluent volumes — minor.
Purity and identity were on point. Only nitpick is the vial is a touch small for larger diluent volumes — minor.
Being able to look up the certificate by lot number before ordering is the whole reason we switched. Documentation is impeccable.
Ordered the 5-vial bundle — per-vial pricing is fair and the volume discount applied exactly as shown. Smooth checkout.
Ordered the 5-vial bundle — per-vial pricing is fair and the volume discount applied exactly as shown. Smooth checkout.
Lyophilized cake dissolved fully in bacteriostatic water with no cloudiness or residue. Net peptide content on the COA let me hit exact working concentrations.
Dispatched same day, arrived sealed with legible lot numbers. The batch report was already in the vault before the package landed.
