P21
P021 · Ac-DGGLAG-NH2 adamantyl · C36H55N9O12 · monoisotopic 805.3970 Da. The index holds 4 assay reports on this compound across 1 batches from 1 suppliers.
Analytical fingerprint
Hand-authored chemistry. These properties describe the substance and do not change when a record is added.
P21 is an adamantylated hexapeptide amide derived from a CNTF fragment. The adamantyl group is worth 2 min of retention, so the des-adamantyl impurity is far from the main peak and easy to quantify — one of the few compounds here where the diagnostic impurity is trivially resolved. Thin coverage.
- Compound class
- Neuroactive and cognitive peptides
- Molecular formula
- C36H55N9O12
- Monoisotopic mass
- 805.3970Da
- Average mass
- 805.88Da
- Residues
- 6
- Nominal retention (RG-2, 30 min)
- 10.42min
- Retention window
- 0.30min
- Counter-ion as usually shipped
- acetate
- Typical label claims
- 5 mg · 10 mg
- Analytical difficulty (index scale)
- 0.85 — straightforward
- Purity is a defined quantity
- YES
Representative chromatogram
Drawn from this page's own medians. Not a scan, not an illustration, and not any single report.
What the index has observed
Arithmetic over the 4 records the index holds. Aggregates on this page are computed over the records the index holds, which are not a random sample of the material on the market. Lots that get tested are lots someone chose to test. Read every figure here as a description of this dataset rather than as an estimate of a population.
Fewer than twelve purity records (n=4) — a histogram of this would be a picture of the sample size rather than of the compound. The individual values are in the table below.
Characteristic impurities and degradants
The left three columns are authored chemistry — what this molecule characteristically carries and where it elutes. The right three are what the index has actually reported.
| Named species | ΔRT (min, RG-2) | Δ mass (Da) | Seen in | Median % area | Max % area |
|---|---|---|---|---|---|
| des-adamantyl (−134 Da) | -2.06 | -134.110 | 100% | 0.17 | 0.33 |
| free acid (+1 Da) | +0.22 | +0.984 | 100% | 0.10 | 0.44 |
| aspartimide (−18 Da) | +0.30 | -18.011 | 100% | 0.32 | 0.62 |
| des-acetyl (−42 Da) | -0.42 | -42.011 | 75% | 0.07 | 0.10 |
Degradation pathways
- adamantylation loss
- aspartimide at the Asp-Gly motif
Full impurity profile, with what each named species implies about the synthesis →
Quarterly coverage
Most recent records
| Report | Supplier | Lot | Lab | Quarter | Purity % | Water % | Recovery % | Provenance | Flags | Result |
|---|---|---|---|---|---|---|---|---|---|---|
| AX-2025-019900 | SWB | SWB-2408-T5745 | Medutest | 2025-Q1 | 99.83 | 8.60 | 100.9 | Supplier-supplied | 0 | PASS |
| AX-2025-019902 | SWB | SWB-2408-T5745 | Nordanalyt | 2025-Q1 | 99.13 | 8.30 | 99.0 | Supplier-supplied | 1 | MARGINAL |
| AX-2025-019903 | SWB | SWB-2408-T5745 | Medutest | 2025-Q1 | 98.88 | 8.08 | — | Buyer-sourced | 0 | PASS |
| AX-2025-019901 | SWB | SWB-2408-T5745 | Nordanalyt | 2025-Q1 | 99.26 | 8.49 | — | Supplier-supplied | 0 | PASS |