AssayIndex

HOMO-2506-L4686

MK-677 (Ibutamoren mesylate) · 250 mg declared · Hunan Aslsen Technology Co., Ltd. · manufactured 07 Jun 2025

CHARACTERISED
Lot code
HOMO-2506-L4686
Supplier
Homopeptide — Hunan Aslsen Technology Co., Ltd.
Compound
MK-677 (Ibutamoren mesylate)
Compound class
Non-peptide adjuncts
Declared label claim
250mg
Manufacture date
07 Jun 2025
Index quarter
2025-Q4
Independent assays
13
Laboratories involved
Janoshik, Medutest, VendorInvestigate, PeptideMeter, Kestrel
Provenance mix
Buyer-sourced ×13
Section 1

Reproducibility across independent tests

Every report below is an observation of the same physical material. What they disagree about is measurement; what they agree about is the lot. The size of the disagreement is compared against what the contributing laboratories' own repeatability figures predict.

Independent assays 13
Median purity 99.93% n=13
Spread (max − min) 0.42pp n=13
Standard deviation 0.132pp n=13
97.798.198.598.999.399.7100.1This lot (HOMO-2506-L4686)This lot (HOMO-2506-L4686): Q1 99.80, median 99.93, Q3 99.93, n=13outlier 99.51n=13All MK-677 (Ibutamoren mesylate)All MK-677 (Ibutamoren mesylate): Q1 99.11, median 99.49, Q3 99.80, n=143outlier 97.90outlier 97.95n=143 Purity (% area)
Figure 1. This lot's independent purity results against the whole MK-677 (Ibutamoren mesylate) record set in the index. The vertical line is the index acceptance specification for the non-peptide adjuncts class, 98.5 % area. A narrow box on the top row against a wide box on the bottom row is the ideal reading: it means the disagreement between lots is much larger than the disagreement within this one.
Section 2

Member reports 13

Every report the index holds on this lot. Each is a page carrying its own chromatogram, mass spectrum, mass balance, provenance and caveats.

ReportLotLabQuarterPurity %Water %Recovery %ProvenanceFlagsResult
AX-2025-019787HOMO-2506-L4686Janoshik2025-Q499.931.8191.7Buyer-sourced0FAIL
AX-2025-019788HOMO-2506-L4686Janoshik2025-Q499.721.45Buyer-sourced0FAIL
AX-2025-019789HOMO-2506-L4686Medutest2025-Q499.931.59Buyer-sourced0FAIL
AX-2025-019790HOMO-2506-L4686Medutest2025-Q499.931.09Buyer-sourced1FAIL
AX-2025-019791HOMO-2506-L4686VendorInvestigate2025-Q499.701.37102.4Buyer-sourced0FAIL
AX-2025-019792HOMO-2506-L4686Janoshik2025-Q499.891.4095.5Buyer-sourced0FAIL
AX-2025-019793HOMO-2506-L4686Janoshik2025-Q499.511.23Buyer-sourced0FAIL
AX-2025-019794HOMO-2506-L4686PeptideMeter2025-Q499.931.59Buyer-sourced0FAIL
AX-2025-019795HOMO-2506-L4686PeptideMeter2025-Q499.931.31103.3Buyer-sourced0FAIL
AX-2025-019796HOMO-2506-L4686Janoshik2025-Q499.931.00Buyer-sourced1FAIL
AX-2025-019797HOMO-2506-L4686Janoshik2025-Q499.801.22105.9Buyer-sourced0FAIL
AX-2025-019798HOMO-2506-L4686Medutest2025-Q499.931.34Buyer-sourced1FAIL
AX-2025-019799HOMO-2506-L4686Kestrel2025-Q499.931.74Buyer-sourced1FAIL
Section 3

By laboratory

Where more than one laboratory assayed this lot, the difference between them is a paired observation of their relative bias — the same material, the same time window, different instruments. Those pairs are what the index's bias estimates are built from.

LaboratoryReportsPurity results (% area)MedianGradientPublished bias (pp)Bias-adjusted
Janoshik699.93, 99.72, 99.89, 99.51, 99.93, 99.8099.8430min+0.0099.84
Medutest399.93, 99.93, 99.9399.9325min+0.0899.85
VendorInvestigate199.7099.7032min-0.1199.81
PeptideMeter299.93, 99.9399.9328min-0.0599.98
Kestrel199.9399.9315min+0.2499.69

This lot contributes 10 paired comparisons to the inter-lab analysis.

Section 4

The supplier's certificate for this lot

One number the supplier wrote, beside the median of the numbers other people measured on the same physical material. That comparison is only available because the index groups by lot.

FigureSupplier COAThis reportIndex note
Purity (% area)99.9099.93divergence -0.03 pp vs batch median
Total impurities (% area)0.100.07
Largest single impurity (% area)0.040.04
Water (%)0.81.81
Counter-ion (%)not stated16.14
Peptide content (%w/w)not stated81.85
Endotoxin (EU/mg)not statednot determined
Method stated on certificateNOno method section — the result cannot be reconciled against any other
Section 5

Impurity fingerprint

The named impurities reported across this lot's assays, with how consistently each was seen. A fingerprint is what allows two lot numbers held by different companies to be identified as one bulk.

Named impurityReported inMedian % areaRange
free base (des-mesylate, −96 Da)13 / 130.040.03–0.28
spiroindane regioisomer13 / 130.030.03–0.16
O-desmethyl metabolite analogue (−14 Da)4 / 130.030.02–0.04
sulfonamide hydrolysis product (+18 Da)4 / 130.040.02–0.05
Section 7

What this rollup does not establish