How to Read a DSIP Certificate of Analysis (COA)
A Certificate of Analysis is only useful if you know which number on it matters for the compound in front of you. For DSIP, the informative checks are not the same as for a generic short peptide.
In plain English
Confirm the weight near 848.9 — then, crucially, look at the separation trace rather than stopping at the weight. The internal rearrangement this molecule is prone to produces something identical in weight, so weight testing alone will miss it entirely. Extra or broadened peaks are the tell.
What DSIP actually is
DSIP stands for Delta Sleep-Inducing Peptide. It was isolated in the 1970s from the blood of animals in deep sleep — its name records how it was discovered, not a settled explanation of what it does. Decades on, researchers still have not agreed on its mechanism.
Supplied for laboratory research use only — not for human or animal use.
Third-party tested by HPLC and LC-MS, ≥99% purity, with a Certificate of Analysis on every order. Ships across Canada.
Technical detail below
Assays that are informative for DSIP
What to check on the COA
Confirm the molecular ion near 848.9 Da. Watch for isomerised species, which are isobaric with the parent (identical mass) and therefore invisible to mass spectrometry — they show only as additional or broadened RP-HPLC peaks. This is a case where the chromatogram is more informative than the mass spectrum.
Isoaspartyl species, succinimide intermediate, and oxidised tryptophan products.
Verify a Popular Peptides batch
Every batch is third-party tested by HPLC and LC-MS with a published Certificate of Analysis (≥99% purity). Enter a lot number to pull the COA for the exact vial in front of you.
What DSIP is studied for
Investigated for effects on slow-wave sleep in the models that gave the peptide its name.
Studies have examined interactions with stress-axis signalling.
Explored in preclinical models of oxidative and stress-related neuronal injury.
Notably, decades of work have not converged on an accepted receptor or mechanism — a recurring theme in the literature.
Summarizes published preclinical literature. Provided for research reference only; not a claim of efficacy or a description of human use.
More DSIP reference
Lyophilized and reconstituted storage conditions, plus the practical working window.
Diluent selection, dissolution behaviour, and the calculator preset for this compound.
Which solvents work, why, and what abnormal dissolution behaviour indicates.
The specific chemical routes by which this molecule breaks down, and how to limit each.
Compound-specific bench practices, and the errors most often made with this molecule.
What to inspect on arrival, and which conditions actually warrant rejecting a vial.
Questions specific to this compound — structure, chemistry, and common misconceptions.
Purity & COA reference for other compounds
DSIP is supplied strictly as a research chemical for in-vitro laboratory and research use only. It is not intended for human or animal consumption, diagnostic, or therapeutic use. This page is educational laboratory-handling reference information — not medical advice, not usage guidance, and not a protocol.