AssayIndex
Short bioregulator peptides

Pinealon

Glu-Asp-Arg · EDR · C15H26N6O8 · monoisotopic 418.1812 Da. The index holds 19 assay reports on this compound across 3 batches from 3 suppliers.

19 reports3 batchesmedian 99.24 %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.

A tripeptide with two acidic residues, essentially unretained at 4.86 min. Both principal degradation products lose 18 Da and are chromatographically close, so mass alone cannot distinguish pyroglutamate from aspartimide here; MS/MS is required and rarely supplied. The index reports "−18 Da species, unassigned" on most pinealon records, which is the honest description.

Molecular formula
C15H26N6O8
Monoisotopic mass
418.1812Da
Average mass
418.41Da
Residues
3
Nominal retention (RG-2, 30 min)
4.86min
Retention window
0.20min
Counter-ion as usually shipped
acetate
Typical label claims
10 mg · 20 mg
Analytical difficulty (index scale)
0.80 — 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.

05514110281654322057 Pinealon4.86 min · 99.24 % 5.04 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 Pinealon trace on the index reference method RG-2, constructed from this page's own numbers: the main peak carries the index median purity of 99.24 % area at the nominal retention time of 4.86 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 19 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 99.24% n=19
Interquartile range 0.73pp n=19
Minimum 98.53% n=19
Maximum 99.93% n=19
Pass rate vs spec 84.2% n=19
Median recovery vs claim 96.5% n=10
Median water 8.24% n=19
Median |mass error| 3.1ppm n=16
024692.093.094.095.096.097.098.099.0100.092.00–92.25 %: 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=098.50–98.75 %: n=198.75–99.00 %: n=299.00–99.25 %: n=799.25–99.50 %: n=199.50–99.75 %: n=299.75–100.00 %: n=6median 99.24 Purity (% area) Reports
Figure 2. Purity distribution across all 19 Pinealon records. Dashed line is this compound's median (99.24 %); the solid vertical is the index acceptance specification for the short bioregulator 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.

98.498.799.099.299.599.8100.0CPCCPC: Q1 99.06, median 99.16, Q3 99.31, n=14outlier 98.53outlier 99.77n=14QSCQSC: Q1 99.88, median 99.92, Q3 99.93, n=4n=4 Purity (% area)
Figure 3. Pinealon 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
Glu-Asp dipeptide (−156 Da)-0.30-156.10195%0.110.82
aspartimide (−18 Da)+0.14-18.01195%0.160.49
pyroglutamate (−18 Da)+0.18-18.01184%0.200.30
Asp-Arg dipeptide (−129 Da)-0.34-129.04379%0.060.12

Degradation pathways

  • N-terminal pyroglutamate cyclisation
  • aspartimide

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

Section 7

Quarterly coverage

QuarterReportsMedian purityRange
2024-Q10n<3—
2024-Q21499.1698.53–99.77
2024-Q30n<3—
2024-Q40n<3—
2025-Q10n<3—
2025-Q20n<3—
2025-Q30n<3—
2025-Q41n<3—
2026-Q10n<3—
2026-Q2499.9299.83–99.93
2026-Q30n<3—

Quarter-by-quarter detail →

Section 8

Most recent records

The 25 most recent Pinealon records of 19.
ReportSupplierLotLabQuarterPurity %Water %Recovery %ProvenanceFlagsResult
AX-2026-041609QSCQSC-2602-V8219VendorInvestigate2026-Q299.837.58—Buyer-sourced0FAIL
AX-2026-041606QSCQSC-2602-V8219Janoshik2026-Q299.907.67104.1Supplier-supplied0FAIL
AX-2026-041608QSCQSC-2602-V8219VendorInvestigate2026-Q299.937.95106.0Buyer-sourced0PASS
AX-2026-041607QSCQSC-2602-V8219Janoshik2026-Q299.937.46—Supplier-supplied0FAIL
AX-2025-019058JEEPJEEP-2507-B3026PeptideMeter2025-Q499.9310.2394.5Supplier-supplied0FAIL
AX-2024-005377CPCCPC-2403-R3097Janoshik2024-Q299.347.93—Supplier-supplied1FAIL
AX-2024-005380CPCCPC-2403-R3097Janoshik2024-Q299.248.6690.1Supplier-supplied1MARGINAL
AX-2024-005389CPCCPC-2403-R3097VendorInvestigate2024-Q298.538.2495.9Buyer-sourced1FAIL
AX-2024-005381CPCCPC-2403-R3097Janoshik2024-Q299.068.5291.9Supplier-supplied1MARGINAL
AX-2024-005387CPCCPC-2403-R3097Medutest2024-Q298.938.28100.8Buyer-sourced1FAIL
AX-2024-005379CPCCPC-2403-R3097Janoshik2024-Q299.698.68—Supplier-supplied1FAIL
AX-2024-005385CPCCPC-2403-R3097PeptideMeter2024-Q298.868.4389.0Buyer-sourced2FAIL
AX-2024-005383CPCCPC-2403-R3097Nordanalyt2024-Q299.237.78—Supplier-supplied1MARGINAL
AX-2024-005390CPCCPC-2403-R3097Medutest2024-Q299.087.89—Supplier-supplied1FAIL
AX-2024-005382CPCCPC-2403-R3097Nordanalyt2024-Q299.128.36—Supplier-supplied1MARGINAL
AX-2024-005386CPCCPC-2403-R3097Medutest2024-Q299.668.36106.9Supplier-supplied2FAIL
AX-2024-005384CPCCPC-2403-R3097Medutest2024-Q299.198.12—Buyer-sourced1FAIL
AX-2024-005388CPCCPC-2403-R3097PeptideMeter2024-Q299.778.00—Supplier-supplied1FAIL
AX-2024-005378CPCCPC-2403-R3097Janoshik2024-Q299.078.4797.1Supplier-supplied1MARGINAL