All compounds described on this website are supplied strictly for in-vitro laboratory research. They are not for human or veterinary use, and no medical or therapeutic claims are made.
Quality & testing
Our research peptides are supplied at 99% purity (HPLC) with identity confirmed by mass spectrometry. Here is what those methods measure, and how we check the information we publish.
Every peptide we supply is tested to 99% purity by high-performance liquid chromatography (HPLC), the method behind most purity figures quoted for research peptides.
Purity tells you how much of the sample is one component; it does not tell you which. Mass spectrometry (LC-MS) confirms the molecular mass matches the expected peptide.
A figure means little without its method. Wherever we state a result we state the technique behind it — HPLC, LC-MS, amino acid analysis — so it can be read critically.
Identifiers, sequences and citations on our compound pages are marked pending until a member of the team has verified them against the primary source.
Analytical methods
A short, neutral explanation of the techniques most often used to characterise research peptides. Understanding the method is the first step to reading a result critically.
Separates components of a sample to quantify the main peak relative to impurities. Typically the basis of a reported purity percentage. The column, mobile phase and detection wavelength influence results, so the laboratory’s method notes matter.
Confirms identity by measuring the mass-to-charge ratio of the analyte and comparing it with the expected molecular mass. Supports — but is distinct from — a purity figure.
For peptides, hydrolyses the sample and quantifies constituent amino acids. Used to estimate net peptide content, which can differ materially from chromatographic purity because of water and counter-ions.
Quantifies water present in a lyophilised material. Helps explain the gap between gross weight and net content where a laboratory reports it.
Reported by some laboratories for research materials. Where a result is available we state the method alongside it; where it is not, we do not infer anything.
An analytical result describes the sample a laboratory tested. It is not a statement of safety, suitability or approval for any use. See the research terminology glossary.
Verification statuses
You will see these labels next to identifiers and citations on compound pages.
A member of the team has compared the value with the primary source (for example the PubChem record or the cited paper) and confirmed it.
The value has been entered but not yet reviewed. It is shown with a pending label so that it is not mistaken for checked data.
The value did not pass review (for example, it could not be reconciled with the source). It is not displayed as fact.
Speak to the team
Orders, availability, documentation and technical questions — our Surrey-based team handles every enquiry directly, for laboratories in the UK and worldwide.
For laboratory research only. All compounds described on this website are supplied strictly for in-vitro laboratory research. They are not for human or veterinary use, and no medical or therapeutic claims are made. Researchers remain responsible for complying with the rules that apply to them.
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