AssayIndex
Growth-hormone axis peptides

CJC-1295 (no DAC)

mod-GRF (1-29) · modified GRF 1-29 · CJC-1295 without DAC · C152H252N44O42 · monoisotopic 3365.7402 Da. The index holds 137 assay reports on this compound across 31 batches from 15 suppliers.

137 reports31 batchesmedian 98.61 %index spec 98.0 %
Section 1

Analytical fingerprint

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

"CJC-1295 no DAC" is mod-GRF (1-29), a tetrasubstituted sermorelin analogue, and it is not CJC-1295 in the sense the original patent used the name. The index catalogues it under the market name with the correct mass (3365.74 monoisotopic) and cross-links the DAC-bearing compound. The most common finding is contamination with native GRF (1-29) at −59 Da, only 0.34 min early: it indicates the substituted amino acids were not fully incorporated, and levels above 1 % correlate with lower measured peptide content in the same lot.

Molecular formula
C152H252N44O42
Monoisotopic mass
3365.7402Da
Average mass
3367.95Da
Residues
29
Nominal retention (RG-2, 30 min)
12.86min
Retention window
0.30min
Counter-ion as usually shipped
acetate
Typical label claims
2 mg · 5 mg · 10 mg
Analytical difficulty (index scale)
1.05 — 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.

02071414162128283 CJC-1295 (no DAC)12.86 min · 98.61 % 12.32 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 CJC-1295 (no DAC) trace on the index reference method RG-2, constructed from this page's own numbers: the main peak carries the index median purity of 98.61 % area at the nominal retention time of 12.86 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 137 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 98.61% n=137
Interquartile range 1.16pp n=137
Minimum 96.72% n=137
Maximum 99.93% n=137
Pass rate vs spec 75.2% n=137
Median recovery vs claim 98.8% n=80
Median water 4.98% n=137
Median |mass error| 2.8ppm n=116
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=196.75–97.00 %: n=397.00–97.25 %: n=297.25–97.50 %: n=697.50–97.75 %: n=697.75–98.00 %: n=1698.00–98.25 %: n=1898.25–98.50 %: n=998.50–98.75 %: n=1898.75–99.00 %: n=1799.00–99.25 %: n=899.25–99.50 %: n=1299.50–99.75 %: n=799.75–100.00 %: n=14median 98.61 Purity (% area) Reports
Figure 2. Purity distribution across all 137 CJC-1295 (no DAC) records. Dashed line is this compound's median (98.61 %); the solid vertical is the index acceptance specification for the growth-hormone axis peptides class (98.0 %). 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.

96.597.197.798.398.999.6100.2CPCCPC: Q1 97.33, median 97.65, Q3 97.89, n=22n=22GGPepsGGPeps: Q1 97.94, median 98.23, Q3 98.57, n=20n=20QSCQSC: Q1 98.69, median 99.08, Q3 99.52, n=14n=14FGPFGP: Q1 99.40, median 99.61, Q3 99.93, n=12n=12BCHBCH: Q1 98.18, median 98.29, Q3 98.60, n=10outlier 99.35n=10MKMMKM: Q1 97.79, median 98.36, Q3 99.08, n=8n=8ERPERP: Q1 98.62, median 98.89, Q3 99.10, n=8outlier 99.93n=8TFCTFC: Q1 98.71, median 98.84, Q3 99.20, n=8n=8KPKP: Q1 98.76, median 98.97, Q3 99.40, n=8n=8HomopeptideHomopeptide: Q1 98.93, median 99.33, Q3 99.88, n=7n=7WXTWXT: Q1 98.08, median 98.14, Q3 98.22, n=6outlier 96.95n=6QYBQYB: Q1 98.63, median 98.86, Q3 99.64, n=5n=5GL BiochemGL Biochem: Q1 97.81, median 97.91, Q3 97.99, n=4n=4SGNSGN: Q1 98.12, median 98.26, Q3 98.96, n=3n=3SWBSWB: Q1 98.71, median 98.72, Q3 98.74, n=2n=2 Purity (% area)
Figure 3. CJC-1295 (no DAC) 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-Tyr1 (−163 Da)-0.54-163.06398%0.321.77
native GRF (1-29) (−59 Da)-0.34-58.99594%0.212.00
deamidated (+1 Da)-0.24+0.98493%0.171.33
truncated (1-24)-1.16-570.29192%0.111.28
acetyl adduct (+42 Da)+0.44+42.01188%0.081.13

Degradation pathways

  • Asn8 deamidation — the reason the D-Ala/Gln/Ala/Leu substitutions exist
  • Asp-Gly aspartimide during synthesis

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

Section 7

Quarterly coverage

QuarterReportsMedian purityRange
2024-Q10n<3—
2024-Q20n<3—
2024-Q3697.9797.67–98.26
2024-Q41298.9798.18–99.93
2025-Q11998.6397.73–99.55
2025-Q2798.9198.60–99.65
2025-Q31997.9396.72–99.79
2025-Q43198.3996.96–99.93
2026-Q11798.7296.95–99.93
2026-Q2998.9797.49–99.93
2026-Q31798.3297.75–99.93

Quarter-by-quarter detail →

Section 8

Most recent records

The 25 most recent CJC-1295 (no DAC) records of 137.
ReportSupplierLotLabQuarterPurity %Water %Recovery %ProvenanceFlagsResult
AX-2026-041683QSCQSC-2606-V8637Janoshik2026-Q399.933.6397.1Supplier-supplied1FAIL
AX-2026-042669GGPepsGGPE-2606-E8495Medutest2026-Q398.614.0695.5Supplier-supplied0PASS
AX-2026-042665GGPepsGGPE-2606-E8495Janoshik2026-Q398.444.0093.2Supplier-supplied1MARGINAL
AX-2026-042663GGPepsGGPE-2606-E8495Medutest2026-Q397.964.1490.0Laboratory-retained2FAIL
AX-2026-042662GGPepsGGPE-2606-E8495Janoshik2026-Q397.894.1195.1Supplier-supplied0FAIL
AX-2026-041686QSCQSC-2606-V8637Janoshik2026-Q399.934.04—Supplier-supplied0PASS
AX-2026-042666GGPepsGGPE-2606-E8495Janoshik2026-Q397.873.7494.3Buyer-sourced2FAIL
AX-2026-042668GGPepsGGPE-2606-E8495Nordanalyt2026-Q398.024.53103.9Supplier-supplied1MARGINAL
AX-2026-041685QSCQSC-2606-V8637Medutest2026-Q399.933.62—Supplier-supplied1FAIL
AX-2026-042667GGPepsGGPE-2606-E8495Janoshik2026-Q398.134.22106.1Supplier-supplied1MARGINAL
AX-2026-042891MKMMKM-2603-V2347Janoshik2026-Q399.283.63—Supplier-supplied1MARGINAL
AX-2026-042661GGPepsGGPE-2606-E8495Nordanalyt2026-Q398.244.09—Supplier-supplied0PASS
AX-2026-042659GGPepsGGPE-2606-E8495Janoshik2026-Q398.563.7495.8Supplier-supplied1MARGINAL
AX-2026-042670GGPepsGGPE-2606-E8495Janoshik2026-Q398.324.96—Supplier-supplied1MARGINAL
AX-2026-041684QSCQSC-2606-V8637VendorInvestigate2026-Q399.253.33—Buyer-sourced0PASS
AX-2026-042660GGPepsGGPE-2606-E8495PeptideMeter2026-Q397.883.38—Supplier-supplied1FAIL
AX-2026-042941MKMMKM-2512-Y3111PeptideMeter2026-Q297.854.89—Supplier-supplied2FAIL
AX-2026-042664GGPepsGGPE-2606-E8495Nordanalyt2026-Q397.753.84—Buyer-sourced1FAIL
AX-2026-041760FGPFGP-2601-V1242PeptideMeter2026-Q299.936.10—Laboratory-retained2MARGINAL
AX-2026-041763FGPFGP-2601-V1242VendorInvestigate2026-Q299.935.48—Buyer-sourced1MARGINAL
AX-2026-041583QSCQSC-2601-B7339PeptideMeter2026-Q298.815.36—Supplier-supplied2MARGINAL
AX-2026-041584QSCQSC-2601-B7339PeptideMeter2026-Q298.884.8397.5Supplier-supplied2MARGINAL
AX-2026-041762FGPFGP-2601-V1242Janoshik2026-Q299.936.21103.0Supplier-supplied2MARGINAL
AX-2026-041585QSCQSC-2601-B7339Medutest2026-Q298.975.14—Supplier-supplied2MARGINAL
AX-2026-042940MKMMKM-2512-Y3111Janoshik2026-Q297.494.60106.5Supplier-supplied2FAIL