ASSAYED, NOT ASSERTEDResearch-use lot-level COA verification shows measured purity, identity, and release data for sample batch records.See Sample COA->
Sample / demo verification record
Melatonin · Batch PS-MELATONI-2606-041 Verification Card
This public sample record demonstrates how PeptideSource presents lot identity, analytical criteria, and QA release review for B2B procurement files. Live customer batches remain controlled and must be confirmed by PeptideSource QA before internal file use.
Batch summary
Release data snapshot
Purity
98.35 %
- COA Number
- COA-PS-MELATONI-2606-041
- Lot Number
- PS-MELATONI-2606-041
- Specification
- 10 mg / vial
- CAS Number
- 73-31-4
- Molecular Formula
- C13H16N2O2
- Molecular Weight
- 232.3 g/mol
- Mfg Date
- 20 June 2026
- Retest Date
- 20 June 2028
- Endotoxin
- < 0.10 EU/mg
- MS Identity
- 232.3 Da · conforms
- Released By
- Kevin Fang · 21 June 2026
- Storage
- -20 °C, protect from light
Analytical review
Sample release criteria and results
Values below are part of this public demo record and show the format used for batch identity, purity, residual solvent, and release-control review. Current order lots require QA matching by SKU and lot ID.
| Test item | Acceptance criteria | Result | Status |
|---|---|---|---|
| Appearance | White to off-white lyophilized powder | White to off-white lyophilized powder | Pass |
| Identification (LC-MS) | Consistent with reference standard or controlled identity file | Conforms | Pass |
| Peptide Purity (RP-HPLC) | NLT 98.0% | 98.35% | Pass |
| Related Impurities (HPLC) | Each impurity NMT 1.0%; total NMT 2.0% | Each <= 0.80%; total 1.77% | Pass |
| Mass Spectrum (ESI-MS) | 232.3 Da theoretical | 232.3 Da | Pass |
| Peptide Content (Assay) | NLT 90.0% on dry basis |
Batch documents
COA file and analytical method review
Use the full report and method overview when your procurement team needs a document packet for batch identity and release review.
Public Sources & References