AssayIndex
Growth-hormone axis peptides

Hexarelin

examorelin · EP-23905 · C47H58N12O6 · monoisotopic 886.4602 Da. The index holds 48 assay reports on this compound across 10 batches from 9 suppliers.

48 reports10 batchesmedian 99.59 %index spec 99.0 %
Section 1

Analytical fingerprint

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

Hexarelin is 2-methyl-Trp GHRP-6, so its principal synthesis impurity is GHRP-6 itself at −14 Da. Fourteen daltons on an 886 Da molecule is 16 ppm relative — trivially resolved by MS, entirely invisible on a low-resolution instrument, and only 0.48 min apart on RG-2. Any hexarelin report claiming 99.5 %+ from a unit-resolution instrument is recorded here as method-limited.

Molecular formula
C47H58N12O6
Monoisotopic mass
886.4602Da
Average mass
887.05Da
Residues
6
Nominal retention (RG-2, 30 min)
8.92min
Retention window
0.25min
Counter-ion as usually shipped
acetate
Typical label claims
2 mg · 5 mg · 10 mg
Analytical difficulty (index scale)
0.85 — 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.

030156030904412059 Hexarelin8.92 min · 99.59 % 8.44 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 Hexarelin trace on the index reference method RG-2, constructed from this page's own numbers: the main peak carries the index median purity of 99.59 % area at the nominal retention time of 8.92 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 48 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 99.59% n=48
Interquartile range 1.10pp n=48
Minimum 97.69% n=48
Maximum 99.93% n=48
Pass rate vs spec 70.8% n=48
Median recovery vs claim 101.2% n=28
Median water 4.46% n=48
Median |mass error| 1.8ppm n=39
06121892.093.094.095.096.097.098.099.0100.092.00–92.25 %: 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=197.75–98.00 %: n=198.00–98.25 %: n=198.25–98.50 %: n=298.50–98.75 %: n=798.75–99.00 %: n=299.00–99.25 %: n=399.25–99.50 %: n=499.50–99.75 %: n=699.75–100.00 %: n=21median 99.59 Purity (% area) Reports
Figure 2. Purity distribution across all 48 Hexarelin records. Dashed line is this compound's median (99.59 %); the solid vertical is the index acceptance specification for the growth-hormone axis peptides class (99.0 %). 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.

97.597.998.498.899.299.7100.1ASYASY: Q1 99.68, median 99.82, Q3 99.91, n=11n=11HYBHYB: Q1 99.78, median 99.93, Q3 99.93, n=11outlier 99.35n=11KPKP: Q1 98.66, median 98.69, Q3 98.79, n=6outlier 99.55n=6GGPepsGGPeps: Q1 99.14, median 99.28, Q3 99.31, n=5outlier 98.07outlier 99.82n=5CPCCPC: Q1 98.51, median 98.53, Q3 98.58, n=4outlier 98.68n=4HomopeptideHomopeptide: Q1 99.60, median 99.66, Q3 99.71, n=3n=3BCHBCH: Q1 97.83, median 97.97, Q3 98.22, n=3n=3GSPGSP: Q1 98.90, median 99.01, Q3 99.02, n=3n=3JEEPJEEP: Q1 99.74, median 99.79, Q3 99.84, n=2n=2 Purity (% area)
Figure 3. Hexarelin 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
des-Lys (−128 Da)-0.22-128.09594%0.090.87
oxidised Trp (+16 Da)-0.34+15.99585%0.100.80
des-methyl hexarelin (GHRP-6, −14 Da)-0.48-14.01683%0.110.87
C-terminal free acid (+1 Da)+0.16+0.98479%0.121.16

Degradation pathways

  • Trp oxidation
  • incomplete methylation carried from synthesis

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

Section 7

Quarterly coverage

QuarterReportsMedian purityRange
2024-Q1399.0198.79–99.02
2024-Q22n<398.07–99.82
2024-Q31199.9399.35–99.93
2024-Q4399.2899.14–99.31
2025-Q11199.8299.39–99.93
2025-Q2397.9797.69–98.47
2025-Q30n<3—
2025-Q40n<3—
2026-Q10n<3—
2026-Q21398.6898.44–99.76
2026-Q32n<399.68–99.90

Quarter-by-quarter detail →

Section 8

Most recent records

The 25 most recent Hexarelin records of 48.
ReportSupplierLotLabQuarterPurity %Water %Recovery %ProvenanceFlagsResult
AX-2026-042177JEEPJEEP-2608-Y9547Janoshik2026-Q399.903.42—Buyer-sourced0PASS
AX-2026-042178JEEPJEEP-2608-Y9547VendorInvestigate2026-Q399.684.03—Buyer-sourced0PASS
AX-2026-043097KPKP-2604-X5990Medutest2026-Q299.552.60—Laboratory-retained0PASS
AX-2026-043253CPCCPC-2511-F9455Janoshik2026-Q298.536.11—Buyer-sourced0FAIL
AX-2026-043098KPKP-2604-X5990PeptideMeter2026-Q298.663.14—Buyer-sourced0FAIL
AX-2026-042366HomopeptideHOMO-2602-R3080Janoshik2026-Q299.554.14—Buyer-sourced0PASS
AX-2026-042365HomopeptideHOMO-2602-R3080PeptideMeter2026-Q299.664.4494.8Buyer-sourced0PASS
AX-2026-043100KPKP-2604-X5990Janoshik2026-Q298.823.5792.0Buyer-sourced0FAIL
AX-2026-043099KPKP-2604-X5990Kestrel2026-Q298.583.49106.5Buyer-sourced0FAIL
AX-2026-043254CPCCPC-2511-F9455Janoshik2026-Q298.445.3098.5Buyer-sourced0FAIL
AX-2026-042367HomopeptideHOMO-2602-R3080Janoshik2026-Q299.763.94—Buyer-sourced0PASS
AX-2026-043252CPCCPC-2511-F9455Janoshik2026-Q298.685.21104.7Buyer-sourced0FAIL
AX-2026-043101KPKP-2604-X5990Janoshik2026-Q298.683.0898.2Buyer-sourced0FAIL
AX-2026-043102KPKP-2604-X5990Medutest2026-Q298.703.7991.5Laboratory-retained0FAIL
AX-2026-043255CPCCPC-2511-F9455PeptideMeter2026-Q298.545.44—Buyer-sourced0FAIL
AX-2025-021071BCHBCH-2501-B4807PeptideMeter2025-Q297.975.66105.6Buyer-sourced0FAIL
AX-2025-021069BCHBCH-2501-B4807PeptideMeter2025-Q297.695.9891.4Buyer-sourced0FAIL
AX-2025-021070BCHBCH-2501-B4807Janoshik2025-Q298.475.5298.5Supplier-supplied0FAIL
AX-2025-018999ASYASY-{CAT}-1786Janoshik2025-Q199.754.2293.1Buyer-sourced0PASS
AX-2025-018996ASYASY-{CAT}-1786PeptideMeter2025-Q199.394.13—Buyer-sourced0PASS
AX-2025-019004ASYASY-{CAT}-1786Medutest2025-Q199.823.83106.4Buyer-sourced0PASS
AX-2025-018997ASYASY-{CAT}-1786Nordanalyt2025-Q199.613.84107.2Buyer-sourced0PASS
AX-2025-019002ASYASY-{CAT}-1786Janoshik2025-Q199.864.2499.8Buyer-sourced0PASS
AX-2025-019000ASYASY-{CAT}-1786Janoshik2025-Q199.563.9390.6Laboratory-retained0PASS
AX-2025-019005ASYASY-{CAT}-1786Janoshik2025-Q199.914.76103.5Buyer-sourced0PASS