Research Resources

A Certificate of Analysis is the analytical record for a specific lot of research material. This guide explains the fields a COA commonly includes, how to read them without overstating conclusions, and where a COA's limits begin.

Before any material enters a workflow, documentation is reviewed against the physical item. This practical checklist covers labels, identifiers, COAs, packaging, receipt records, and discrepancy handling — adaptable to laboratory SOPs.

The labeled mass of a peptide and the amount of actual peptide it contains are not always the same number. This guide explains net peptide content, what accounts for the difference, and how to read the relevant COA fields without overstating them.

The terms that appear on a Certificate of Analysis and across research-material documentation, defined in plain language and grouped by topic — analytical methods, peptide chemistry, documentation and quality, and storage and handling.

Concepts are easier to apply against a concrete example. This walkthrough presents an illustrative (not real) Certificate of Analysis and annotates every field — what it means, how to read it, and what to check — so a real COA becomes straightforward.

A research peptide is supplied as a salt, paired with a counterion such as acetate or trifluoroacetate. This reference explains what the salt form means on a COA and why it affects net peptide content, solubility, and analytical background.

Batch traceability links a physical material to its documentation across its lifecycle. This guide explains lot numbers, how identifiers relate to one another, and how traceability supports consistency and accountability.

Purity and identity are different questions answered by different analytical methods. This guide explains what reverse-phase HPLC and LC-MS each measure, why they are used together, and how to interpret method data without overstating it.

An independent third-party report is a separate line of documentation produced by a laboratory other than the supplier. This guide explains what independence means, the role of accredited labs, and how a third-party report complements supplier documentation.

Documentation is one of the clearest signals of how a research-material supplier operates. This guide outlines what complete per-lot documentation includes, what independent verification adds, and the gaps that are worth noticing — framed around records, not claims.

Prototides commissions independent third-party verification from two laboratories — Kovera Labs and BTLabs. This guide explains what third-party testing adds, how to tell which lab verified a lot, and how to read the report alongside the in-house COA.

A purity percentage is one of the most cited — and most misread — figures on a research-peptide COA. This guide explains what a 99% result actually measures, what the remaining percent represents, and why the method behind the number matters as much as the number itself.

Mass spectrometry is how a peptide's identity is confirmed by mass — but the numbers on a COA only make sense once you know what they compare. This guide covers observed vs theoretical mass, monoisotopic vs average, charge states, and tolerance.

A side-by-side comparison framework for evaluating research-peptide suppliers on what can actually be verified — documentation, independent testing, method transparency, and traceability — with what good looks like and the red flags for each.

Identity and purity describe the target molecule; endotoxin testing describes a separate contaminant class. This reference explains what a bacterial endotoxin (LAL) result on a COA measures, how endotoxin units are reported, and where the test's limits lie.

Synthesis and purification leave trace solvents behind. This reference explains what residual solvent testing measures on a COA, how gas chromatography reports it, and how it connects to a peptide's salt form and counterion.

A lyophilized peptide is never perfectly dry. This reference explains what water-content testing measures on a COA, how Karl Fischer titration reports it, and why the water fraction is part of the difference between total mass and net peptide content.

The purity figure on a peptide COA comes from an HPLC chromatogram — a plot of peaks over time. This guide explains retention time, baseline, area-percent, and how the main-peak purity number is derived, so the trace can be read rather than taken on trust.

Amino acid analysis is a reference method for determining how much of a vial's mass is actually peptide. This guide explains how AAA works, why it underpins net-peptide-content figures, and how it complements HPLC purity and MS identity data.

Storage requirements are material dependent and defined by product-specific documentation. This guide covers general environmental factors, packaging integrity, inventory records, and material status segregation for laboratory workflows.

Temperature is one of the main variables that determines how a research peptide holds up over time. This guide covers the -20 °C reference, lyophilized versus reconstituted stability, freeze-thaw cycles, and the cold chain from dispatch to bench.

Research peptides almost always arrive as a lyophilized powder. This guide explains what freeze-drying is, why it is the standard supply form, what the resulting cake looks like, and what it means for reconstitution and handling.

A peptide in solution is generally less stable than the same material as a dry powder. This reference covers how laboratories store reconstituted stock — temperature, aliquoting, freeze–thaw, and light — and the records that track a solution over time.

Repeated freezing and thawing is one of the most cited stability variables for reconstituted peptides. This guide explains the mechanism, why cycle count is tracked, and lab practices — such as aliquoting — that reduce it, all in analytical, record-keeping terms.

A responsible research workflow is built from documented, repeatable practices. This guide covers laboratory readiness, mix-up prevention, receiving inspections, contamination control, and handling of discrepancies — all subject to laboratory-specific SOPs.

Lyophilized research peptides are supplied as a dry powder and prepared into solution before analytical or in-vitro work. This reference covers solvent selection, technique, concentration math, labeling, and the records that keep a prepared solution traceable.

The solvent chosen to reconstitute a research peptide affects whether it dissolves cleanly, how the solution behaves, and whether it is compatible with the downstream method. This reference surveys common laboratory diluents and the criteria used to choose among them.

Whether a peptide dissolves easily or resists is determined by its sequence and salt form. This reference explains the physical factors behind solubility — charge, hydrophobicity, pH, and aggregation — and how they inform solvent choice.

Aliquoting divides a reconstituted stock into single-use portions. This guide covers why the practice is used — reducing freeze-thaw and contamination exposure — how aliquots are sized and labeled, and the records that keep handling history intact.

A reference profile for BPC-157 covering its molecular identity, how identity and purity are characterized analytically, the documentation supplied per lot, and storage and handling considerations — strictly research-use framing.

A reference profile for TB-500 covering its molecular identity as a synthetic peptide, how each lot is characterized by RP-HPLC and LC-MS, the documentation supplied, and storage considerations — strictly research-use framing.

A reference profile for GHK-Cu, the copper-binding tripeptide complex — its molecular identity, how each lot is characterized analytically, the documentation supplied, and storage considerations. Strictly research-use framing.

A reference profile for Selank, a synthetic heptapeptide — its molecular identity, how each lot is characterized by RP-HPLC and LC-MS, the documentation supplied, and storage considerations. Strictly research-use framing.

A reference profile for Semax, a synthetic peptide analogue — its molecular identity, how each lot is characterized by RP-HPLC and LC-MS, the documentation supplied, and storage considerations. Strictly research-use framing.

A reference profile for NAD+, a dinucleotide coenzyme — its molecular identity, how each lot is characterized analytically, the documentation supplied, and moisture-aware storage considerations. Strictly research-use framing.

A reference profile for MOTS-C, a mitochondrial-derived peptide — its molecular identity, how each lot is characterized by RP-HPLC and LC-MS, the documentation supplied, and storage considerations. Strictly research-use framing.

A reference profile for Epithalon, a synthetic tetrapeptide — its molecular identity, how each lot is characterized by RP-HPLC and LC-MS, the documentation supplied, and storage considerations. Strictly research-use framing.

A reference profile for KPV, a tripeptide — its molecular identity, how each lot is characterized by RP-HPLC and LC-MS, the documentation supplied, and handling considerations for a low-mass peptide. Strictly research-use framing.

A reference profile for Ipamorelin covering its molecular identity, how identity and purity are characterized analytically, the documentation supplied per lot, and storage and handling considerations — strictly research-use framing.

A reference profile for Tesamorelin covering its molecular identity, how identity and purity are characterized analytically, the documentation supplied per lot, and storage and handling considerations — strictly research-use framing.

A reference profile for GLP2-T covering its molecular identity, how identity and purity are characterized analytically, the documentation supplied per lot, and storage and handling considerations — strictly research-use framing.

A reference profile for GLP3-RT covering its molecular identity, how identity and purity are characterized analytically, the documentation supplied per lot, and storage and handling considerations — strictly research-use framing.

BPC-157 and TB-500 are both synthetic peptides grouped under growth-factor research, but they differ substantially in size and structure. This reference compares what each molecule is and how each lot is documented — not what either does.

Tesamorelin and Ipamorelin are both synthetic peptides grouped under growth-factor research, separated by an order of magnitude in molecular mass. This reference compares what each molecule is and how each lot is documented — not what either does.

GLP2-T and GLP3-RT are both 39-residue synthetic peptides in the incretin-mimetic structural class, differing in receptor-target classification and molecular mass. This reference compares what each molecule is and how each lot is documented — not what either does.

Semax and Selank are both synthetic heptapeptides grouped under cognitive research, closely matched in size but derived from entirely different parent sequences. This reference compares what each molecule is and how each lot is documented — not what either does.