AssayIndex
Melanocortin-receptor peptides

Kisspeptin-10

KP-10 · metastin (45-54) · C63H83N17O14 · monoisotopic 1301.6300 Da. The index holds 76 assay reports on this compound across 11 batches from 8 suppliers.

76 reports11 batchesmedian 99.28 %index spec 98.5 %
Section 1

Analytical fingerprint

Hand-authored chemistry. These properties describe the substance and do not change when a record is added.

Kisspeptin-10's C-terminal amide is essential, and the +1 Da free acid is both the commonest impurity and a functional one. The index reports it separately. Otherwise a routine decapeptide assay.

Molecular formula
C63H83N17O14
Monoisotopic mass
1301.6300Da
Average mass
1302.46Da
Residues
10
Nominal retention (RG-2, 30 min)
9.14min
Retention window
0.25min
Counter-ion as usually shipped
acetate
Typical label claims
5 mg · 10 mg
Analytical difficulty (index scale)
0.90 — straightforward
Purity is a defined quantity
YES
Section 2

Representative chromatogram

Drawn from this page's own medians. Not a scan, not an illustration, and not any single report.

029335867880011733 Kisspeptin-109.14 min · 99.28 % 8.80 same trace · ×200 vertical expansion, baseline-corrected · main peak off-scale reporting threshold 0.05 % area 05101520253035 Retention time (min) Response (mAU)
Figure 1. A representative Kisspeptin-10 trace on the index reference method RG-2, constructed from this page's own numbers: the main peak carries the index median purity of 99.28 % area at the nominal retention time of 9.14 min, and each impurity peak carries the median area the index has observed for that named species at its characteristic retention offset. It is not a scan of any single report — every individual record's own chromatogram is on its own page. The lower panel is the same trace at a stated vertical expansion, baseline-corrected, so the impurities are visible; the main peak runs off-scale there by design. Baseline noise is seeded from the compound slug.
Section 3

What the index has observed

Arithmetic over the 76 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.

Median purity 99.28% n=76
Interquartile range 0.72pp n=76
Minimum 98.37% n=76
Maximum 99.93% n=76
Pass rate vs spec 98.7% n=76
Median recovery vs claim 96.8% n=49
Median water 4.69% n=76
Median |mass error| 3.0ppm n=64
05101592.093.094.095.096.097.098.099.0100.092.00–92.25 %: n=092.25–92.50 %: n=092.50–92.75 %: n=092.75–93.00 %: n=093.00–93.25 %: n=093.25–93.50 %: n=093.50–93.75 %: n=093.75–94.00 %: n=094.00–94.25 %: n=094.25–94.50 %: n=094.50–94.75 %: n=094.75–95.00 %: n=095.00–95.25 %: n=095.25–95.50 %: n=095.50–95.75 %: n=095.75–96.00 %: n=096.00–96.25 %: n=096.25–96.50 %: n=096.50–96.75 %: n=096.75–97.00 %: n=097.00–97.25 %: n=097.25–97.50 %: n=097.50–97.75 %: n=097.75–98.00 %: n=098.00–98.25 %: n=098.25–98.50 %: n=198.50–98.75 %: n=1298.75–99.00 %: n=1099.00–99.25 %: n=1499.25–99.50 %: n=1199.50–99.75 %: n=1199.75–100.00 %: n=17median 99.28 Purity (% area) Reports
Figure 2. Purity distribution across all 76 Kisspeptin-10 records. Dashed line is this compound's median (99.28 %); the solid vertical is the index acceptance specification for the melanocortin-receptor peptides class (98.5 %). Domain is fixed at 92–100 % on every purity histogram on this site so that compounds can be compared by eye — a wide distribution here is a hard compound, a narrow one is an easy one, and neither is a statement about the suppliers.
Section 4

By supplier

Suppliers with fewer than two purity records on this compound are omitted from the figure rather than drawn as a line. The full table, including the thin cells, is on the by-supplier page.

98.298.598.899.299.599.8100.1TFCTFC: Q1 99.20, median 99.32, Q3 99.50, n=14n=14WWBWWB: Q1 99.71, median 99.92, Q3 99.93, n=13outlier 99.34n=13ASYASY: Q1 99.39, median 99.66, Q3 99.93, n=11n=11GL BiochemGL Biochem: Q1 98.56, median 98.71, Q3 98.93, n=9n=9TFSTFS: Q1 98.98, median 99.10, Q3 99.28, n=9n=9CPCCPC: Q1 98.59, median 98.66, Q3 98.89, n=8outlier 99.53n=8ERPERP: Q1 98.75, median 99.07, Q3 99.07, n=7n=7QSCQSC: Q1 99.42, median 99.49, Q3 99.93, n=5n=5 Purity (% area)
Figure 3. Kisspeptin-10 purity by supplier, ordered by coverage. The vertical line is the index acceptance specification. Boxes that overlap are suppliers this dataset cannot separate, and most of them overlap.

Full per-supplier table with n= caveats →

Section 5

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 speciesΔRT (min, RG-2)Δ mass (Da)Seen inMedian % areaMax % area
oxidised Trp (+16 Da)-0.34+15.99595%0.210.87
C-terminal free acid (+1 Da)+0.18+0.98491%0.110.77
des-Tyr (−163 Da)-0.56-163.06389%0.130.66
[D-Trp]-epimer-0.12mass-identical88%0.100.89

Degradation pathways

  • Trp oxidation
  • C-terminal amide hydrolysis — the amide is required for activity

Full impurity profile, with what each named species implies about the synthesis →

Section 7

Quarterly coverage

QuarterReportsMedian purityRange
2024-Q12n<399.49–99.93
2024-Q21399.9299.34–99.93
2024-Q3399.4099.23–99.75
2024-Q41999.3298.37–99.93
2025-Q1399.4299.32–99.93
2025-Q22n<398.61–98.63
2025-Q30n<3—
2025-Q41499.0798.71–99.60
2026-Q10n<3—
2026-Q21199.2498.90–99.63
2026-Q3998.7198.50–98.99

Quarter-by-quarter detail →

Section 8

Most recent records

The 25 most recent Kisspeptin-10 records of 76.
ReportSupplierLotLabQuarterPurity %Water %Recovery %ProvenanceFlagsResult
AX-2026-043179GL BiochemGLBI-2608-N7715Medutest2026-Q398.974.37—Buyer-sourced1MARGINAL
AX-2026-043178GL BiochemGLBI-2608-N7715Janoshik2026-Q398.504.55—Buyer-sourced1MARGINAL
AX-2026-043184GL BiochemGLBI-2608-N7715Janoshik2026-Q398.993.63100.6Supplier-supplied1MARGINAL
AX-2026-043185GL BiochemGLBI-2608-N7715Medutest2026-Q398.713.71107.0Buyer-sourced1MARGINAL
AX-2026-043182GL BiochemGLBI-2608-N7715Janoshik2026-Q398.933.8695.7Buyer-sourced1MARGINAL
AX-2026-043183GL BiochemGLBI-2608-N7715PeptideMeter2026-Q398.544.17102.2Buyer-sourced1MARGINAL
AX-2026-043186GL BiochemGLBI-2608-N7715Janoshik2026-Q398.563.6096.8Buyer-sourced1MARGINAL
AX-2026-043181GL BiochemGLBI-2608-N7715Janoshik2026-Q398.774.0695.2Buyer-sourced1MARGINAL
AX-2026-043180GL BiochemGLBI-2608-N7715Janoshik2026-Q398.693.9988.8Buyer-sourced2MARGINAL
AX-2026-042326TFCTFC-2604-B2419Janoshik2026-Q299.245.74103.7Buyer-sourced0PASS
AX-2026-042322TFCTFC-2604-B2419Medutest2026-Q299.044.34—Buyer-sourced0PASS
AX-2026-042318TFCTFC-2604-B2419Nordanalyt2026-Q299.445.7796.8Buyer-sourced0PASS
AX-2026-042325TFCTFC-2604-B2419Nordanalyt2026-Q299.634.9891.1Buyer-sourced1MARGINAL
AX-2026-042316TFCTFC-2604-B2419PeptideMeter2026-Q298.925.25—Buyer-sourced0PASS
AX-2026-042323TFCTFC-2604-B2419PeptideMeter2026-Q299.494.6189.6Buyer-sourced1MARGINAL
AX-2026-042321TFCTFC-2604-B2419Janoshik2026-Q299.514.6390.1Buyer-sourced0PASS
AX-2026-042320TFCTFC-2604-B2419PeptideMeter2026-Q298.904.70103.2Buyer-sourced0PASS
AX-2026-042317TFCTFC-2604-B2419Janoshik2026-Q299.504.2797.3Buyer-sourced0PASS
AX-2026-042324TFCTFC-2604-B2419Janoshik2026-Q299.225.23105.6Buyer-sourced0PASS
AX-2026-042319TFCTFC-2604-B2419Janoshik2026-Q299.195.09—Buyer-sourced0PASS
AX-2025-018896TFSTFS-{CAT}-9204Medutest2025-Q498.713.40103.4Buyer-sourced0PASS
AX-2025-020174ERPERP-2508-R9614VendorInvestigate2025-Q498.864.3894.2Buyer-sourced0PASS
AX-2025-018892TFSTFS-{CAT}-9204Medutest2025-Q498.903.20—Buyer-sourced1FAIL
AX-2025-020173ERPERP-2508-R9614Medutest2025-Q499.083.23—Buyer-sourced0PASS
AX-2025-018900TFSTFS-{CAT}-9204Kestrel2025-Q499.533.9398.3Buyer-sourced0PASS