Purity at 99.52 % and water at 3.43 %: the two numbers are independent and both are needed. Excellent chromatography on a wet cake still yields less peptide per vial than the label implies.
uncertainty_budget
Combined standard uncertainty for a purity figure. Nobody publishes one.
Section 1
Contribution
Both submits records and annotates other people's.
Records submitted
6
n=6
Annotations
174
n=174
Median purity submitted
99.12%
n=6
Suppliers covered
5
n=6
Section 2
Records submitted
A submitter chose to buy this material and to pay for this assay. That choice is the selection mechanism behind the whole index and it is not random.
| Report | Compound | Supplier | Lot | Lab | Quarter | Purity % | Water % | Recovery % | Provenance | Flags | Result |
|---|---|---|---|---|---|---|---|---|---|---|---|
| AX-2026-042004 | Semaglutide | AMB | AMB-2607-N6274 | Medutest | 2026-Q3 | 97.74 | 6.45 | — | Buyer-sourced | 1 | MARGINAL |
| AX-2026-043348 | Leuprolide | WXT | WXT-2604-K2596 | Janoshik | 2026-Q3 | 98.70 | 5.74 | 99.0 | Buyer-sourced | 0 | PASS |
| AX-2025-018791 | Semaglutide | FGP | FGP-2506-J7851 | VendorInvestigate | 2025-Q4 | 99.93 | 4.54 | 91.2 | Buyer-sourced | 1 | MARGINAL |
| AX-2025-020307 | MK-677 (Ibutamoren mesylate) | GGPeps | GGPE-2507-S2892 | PeptideMeter | 2025-Q3 | 99.79 | 4.47 | 94.6 | Buyer-sourced | 0 | FAIL |
| AX-2024-004911 | Retatrutide | GGPeps | GGPE-2411-R9634 | PeptideMeter | 2024-Q4 | 98.98 | 5.81 | 99.9 | Buyer-sourced | 0 | PASS |
| AX-2024-004127 | Semax | WWB | WWB-2308-N1754 | Janoshik | 2024-Q1 | 99.26 | 5.49 | 93.9 | Buyer-sourced | 0 | PASS |
Section 3
Annotations
Signed technical comments on records. The index does not moderate annotations for agreement with its own arithmetic, and several of these disagree with it. Where a handle has made the same point on several records, one instance is shown and the rest are reachable from the records themselves.
Integration boundary on a close pair contributes up to 0.45 pp of standard uncertainty on its own. That is the term to quote alongside 99.00 % rather than a resolution verdict.
Expanded uncertainty on a well-resolved main peak is about ±0.48 pp at 95 % confidence. 99.40 % should be read as a band, and the band is still comfortably above the class specification.
Expanded uncertainty on a well-resolved main peak is about ±0.48 pp at 95 % confidence. 99.47 % should be read as a band, and the band is still comfortably above the class specification.
Expanded uncertainty on a well-resolved main peak is about ±0.48 pp at 95 % confidence. 99.53 % should be read as a band, and the band is still comfortably above the class specification.
Expanded uncertainty on a well-resolved main peak is about ±0.48 pp at 95 % confidence. 99.36 % should be read as a band, and the band is still comfortably above the class specification.
Expanded uncertainty on a well-resolved main peak is about ±0.48 pp at 95 % confidence. 99.37 % should be read as a band, and the band is still comfortably above the class specification.
Expanded uncertainty on a well-resolved main peak is about ±0.48 pp at 95 % confidence. 99.46 % should be read as a band, and the band is still comfortably above the class specification.
The gap between 97.67 % and the class specification should be read against an expanded uncertainty of roughly ±0.5 pp. A shortfall inside that band is not a finding; a shortfall well outside it is.
The gap between 97.95 % and the class specification should be read against an expanded uncertainty of roughly ±0.5 pp. A shortfall inside that band is not a finding; a shortfall well outside it is.
Integration boundary on a close pair contributes up to 0.45 pp of standard uncertainty on its own. That is the term to quote alongside 99.17 % rather than a resolution verdict.
Expanded uncertainty on a well-resolved main peak is about ±0.48 pp at 95 % confidence. 99.93 % should be read as a band, and the band is still comfortably above the class specification.
Showing 12 distinct comments of 174 annotations by this handle.