c.moreau98/100
Consistency: 5 lots, purity band under 0.9 points wide. Janoshik report held on file, figures match published.
SinoPep — SinoPep Biotechnology (Changzhou) Co., Ltd.
Changzhou, CN · established 2011. The index holds 162 assay reports across 30 batches and 15 compounds, contributed by 6 laboratories. Every figure below is computed from those records and from nothing else.
Where SinoPep sells
SinoPep Biotechnology (Changzhou) Co., Ltd. sells from its own storefront. The link is marked nofollow and sponsored: it exists so the figures on this scorecard can be read against what the supplier itself publishes. The index is paid nothing for it and a link is not an assessment.
Visit SinoPep at sinopep.net →
Every figure above describes lots the index has seen. It says nothing about the lot you are offered, and the only check that does is the one on the certificate against the vial.
Block 1
Identification
Business facts, held constant across the index and not derived from the data. The index sells nothing and takes no supplier payment for placement; the storefront link below is marked nofollow and sponsored so a record can be checked against the seller, and is not a recommendation.
- Legal name
- SinoPep Biotechnology (Changzhou) Co., Ltd.
- Short code in this index
- SinoPep
- Also known as
- SNP · SinoPep · SinoPep Bio · 赛诺肽生物科技
- Domain
- sinopep.net →
- City
- Changzhou
- Region
- Jiangsu
- Country
- CN
- Established
- 2011
- First record in index
- 13 Jul 2024
- Most recent record
- 05 Oct 2026
Block 1b
Dispatch and regional stock
Counted from the chain-of-custody line on this supplier's own records, which names the route each vial travelled to the laboratory, and from the on-record reviews below. The index has no sight of any supplier's warehouse network and publishes none.
Domestic-warehouse route
13.0%
n=162
Retail, shipped to the buyer
76.5%
n=162
Direct to the laboratory
6.2%
n=162
Median courier leg, direct despatch
6d
n=10
| Route to the laboratory | Records | Share |
|---|---|---|
| Domestic warehouse despatch | 21 | 13.0% |
| Retail purchase, shipped to the buyer | 101 | 62.3% |
| Retail purchase via a third-party forwarder | 23 | 14.2% |
| Supplier despatch direct to the laboratory | 10 | 6.2% |
| Laboratory retained-sample archive | 7 | 4.3% |
Every record here carries a chain-of-custody line and that line names the route the vial travelled. Of the 162 SinoPep records the index holds, 21 reached the contributing laboratory from a domestic warehouse rather than as a cross-border consignment, covering 11 of the 15 compounds SinoPep is represented by here — Semaglutide, Tirzepatide, CJC-1295 with DAC, IGF-1 LR3, Mazdutide, Retatrutide and 5 further compounds. Those are the SinoPep lines this index has actually seen arrive from regional stock, and they are a count of consignments rather than a stock listing: a line missing from them may simply never have been submitted for assay.
No contributor to this index has named a regional stock location for SinoPep. 21 of its records nevertheless arrived by a domestic-warehouse route, so stock is held somewhere; the index does not know where and will not guess.
The index measures nothing about lead time — it assays material, it does not buy it. What it has is SinoPep's own reviewers: 1 of the 15 on-record reviews state a quoted window and what happened against it. Where SinoPep despatched a sample direct to a laboratory, the courier leg ran a median 6 days across 10 such consignments — that is a transit time the index can see, and it is not the same thing as a lead time. The reviews are reproduced in full in Block 11.
Block 2
Headline statistics
Each figure carries the n it was computed from. The n= badge next to a statistic is the number of records it was computed from. Below n=8 the badge is amber. Below n=3 the statistic is suppressed and the individual values are shown instead.
Median purity
98.83%
n=162
Interquartile range
1.00pp
n=162
10th percentile
97.83%
n=162
Pass rate vs index spec
97.5%
n=162
Median recovery vs claim
97.9%
n=110
Median water
5.06%
n=162
Median |mass error|
2.8ppm
n=145
Records carrying a flag
48.8%
n=162
Block 3
Reproducibility across independent tests of one lot
Where the same physical lot was assayed more than once, the spread between those results is a property of the material and the fill, not of the market. It is the rarest and most informative statistic on this page, and it exists only for lots someone tested twice.
Median within-batch spread
0.72pp
n=21
Index median spread
0.67pp
n=28
Lots tested 3+ times
21
n=30
Across the 21 SinoPep lots in the index with three or more independent assays, the median spread between the highest and lowest purity result on one lot is 0.72 pp. Interpreting that number requires the laboratory repeatability figures: the best contributing laboratory here repeats to 0.16 pp and the worst to 0.34 pp, so a within-lot spread under about 0.5 pp is indistinguishable from measurement noise and a spread above 1 pp is a statement about the material.
Block 4
Supplier certificate against independent measurement
The supplier's own COA purity figure for a lot, minus the median of the index's independent observations of the same physical lot. Positive means the certificate reads higher than the measurement. Rule AX-R05 fires above 1.5 pp.
Median COA divergence
-0.02pp
n=30
Index median divergence
+0.06pp
n=28
Divergences in the supplier's favour
47%
n=30
Divergences beyond 1 pp
3%
n=30
Block 5
Provenance — where the tested material came from
Supplier-supplied samples are weaker evidence than independently purchased ones, because the supplier chose the vial. The index measures the size of that effect rather than assuming it.
Buyer-sourced median
98.74%
n=145
Supplier-supplied median
99.38%
n=10
Supplier-supplied share of records
6.2%
n=162
Block 6
Documentation completeness
The score is not an opinion about paperwork. Each component is the share of SinoPep batches in the index whose certificate carries that field, weighted as set out on the scoring rubric.
Documentation score
93/100
n=30
Index median score
85/100
n=28
| Certificate field | Batches carrying it | Rubric weight | |
|---|---|---|---|
| Purity figure stated | 100% | 25 points | |
| Analytical method stated (column, gradient, wavelength) | 80% | 25 points | |
| Peptide content stated | 70% | 20 points | |
| Endotoxin stated | 40% | 15 points | |
| Named impurities rather than a total | 74% | 15 points |
Block 7
Coverage by compound
The delta column is this supplier's median minus the index-wide median for the same compound, which is the only comparison worth making: comparing a supplier's aggregate against another supplier's aggregate compares their product mixes as much as their process control.
| Compound | Class | Reports | Median % | Index median % | Δ (pp) | Index spec | Pass % |
|---|---|---|---|---|---|---|---|
| BPC-157 | Tissue-repair | 24 | 99.13 | 99.16 | -0.03 | 98.0 | 100 |
| Ipamorelin | Growth-hormone | 17 | 99.73 | 99.47 | +0.26 | 99.0 | 82 |
| Semaglutide | Incretin | 17 | 98.49 | 98.89 | -0.40 | 97.0 | 100 |
| Retatrutide | Incretin | 17 | 97.70 | 98.37 | -0.67 | 96.5 | 100 |
| Tirzepatide | Incretin | 17 | 98.61 | 98.55 | +0.06 | 97.0 | 100 |
| Semax | Neuroactive | 15 | 99.47 | 99.46 | +0.01 | 98.5 | 100 |
| IGF-1 LR3 | Growth-hormone | 12 | 98.48 | 98.28 | +0.20 | 95.0 | 100 |
| Mazdutide | Incretin | 12 | 97.97 | 98.14 | -0.17 | 96.5 | 100 |
| Enclomiphene citrate | Non-peptide | 10 | 99.31 | 99.44 | -0.13 | 98.5 | 90 |
| LL-37 | Tissue-repair | 9 | 99.30 | 98.90 | +0.40 | 96.5 | 100 |
| CJC-1295 with DAC | Growth-hormone | 6 n=6 | 98.71 | 98.95 | -0.24 | 97.5 | 100 |
| ARA-290 | Tissue-repair | 2 n=2 | n<3 | 99.42 | — | 98.0 | 100 |
| TB-500 | Tissue-repair | 2 n=2 | n<3 | 99.53 | — | 98.5 | 100 |
| Cagrilintide | Incretin | 1 n=1 | n<3 | 98.69 | — | 96.5 | 100 |
| PEG-MGF | Growth-hormone | 1 n=1 | n<3 | 97.75 | — | 92.0 | 100 |
Full per-compound breakdown with distributions and caveats →
Block 8
Quarterly trend
Submission volume is not market share and a quarterly median is not a trend unless the compound mix held still. Both caveats apply to every row below.
Median purity by quarter
Quarters with fewer than two purity records are gaps in the line rather than zeroes.
Coverage growth
Records added per quarter. Growth here is index coverage, not supplier volume.
| Quarter | Batches | Reports | Median purity | Range | Flagged |
|---|---|---|---|---|---|
| 2024-Q1 | 0 | 0 | n<3 | — | 0 |
| 2024-Q2 | 0 | 0 | n<3 | — | 0 |
| 2024-Q3 | 1 | 4 | 98.72 | 97.59–99.29 | 0 |
| 2024-Q4 | 1 | 5 | 98.15 | 97.87–98.86 | 0 |
| 2025-Q1 | 6 | 25 | 99.10 | 97.17–99.93 | 16 |
| 2025-Q2 | 5 | 24 | 98.72 | 98.29–99.65 | 2 |
| 2025-Q3 | 4 | 20 | 99.02 | 98.14–99.93 | 13 |
| 2025-Q4 | 1 | 5 | 99.46 | 98.85–99.93 | 1 |
| 2026-Q1 | 4 | 29 | 98.55 | 97.29–99.93 | 23 |
| 2026-Q2 | 4 | 21 | 98.04 | 97.49–99.20 | 10 |
| 2026-Q3 | 4 | 29 | 99.09 | 97.93–99.93 | 14 |
Block 9
Which laboratory produced these numbers
Laboratories disagree with each other by a measured amount. A supplier tested mostly by one laboratory carries that laboratory's offset in its aggregate, and the adjusted column removes it.
| Laboratory | Reports | Median purity | Lab bias (pp) | Bias-adjusted |
|---|---|---|---|---|
| Janoshik | 74 | 98.91 | +0.00 | 98.91 |
| PeptideMeter | 27 | 98.70 | -0.05 | 98.75 |
| Medutest | 27 | 98.83 | +0.08 | 98.75 |
| VendorInvestigate | 14 | 98.60 | -0.11 | 98.71 |
| Nordanalyt | 15 | 99.00 | +0.02 | 98.98 |
| Kestrel | 5 | 98.86 | +0.24 | 98.62 |
Bias figures are estimated from paired same-lot comparisons and are published with their confidence intervals on inter-lab agreement.
Block 10
What this data does and does not show
Block 11
On-the-record reviews 15
Reviews are signed statements from index contributors about their own testing of this supplier's material. They are opinions attached to evidence, and they are not used in any statistic on this page.
93.0/ 100641 ratings across the index network
ha.mwangi99/100
Certificate carries counter-ion identity and content, reported as trifluoroacetate with a figure and units. Complete against the index minimum data set at first issue. Research use. Not for human consumption.
n.beaulieu98/100
Lot SNP-2606-A8305 submitted to Janoshik. Declared 98.6%, reported 98.9%. Delta inside method repeatability. Janoshik report held on file.
ay.boateng95/100
Transit 8 days from Changzhou against a quoted 9. Customs documentation correct at first presentation.
ro.okwuosa97/100
Release signed and dated, named individual. Per-milligram figure calculated against the certificate rather than against nominal fill.
d.oyelaran84/100
Analytical record complete and unremarkable. Process observation logged separately: written quotation for a custom sequence issued on day 3 against same-day on catalogue lines. Not an assay finding.
fr.chukwu96/100
Related-substances table itemised by impurity with assigned retention times. Not aggregated. Submitted to the index in full.
ju.coelho97/100
Blind submission of retatrutide 10 mg to Janoshik, origin withheld. 98.8% against 98.5% declared. Figures as reported by the named service.
y.erdogan96/100
Fill uniformity: 11 units weighed against declared fill, all within 2%. No further comment.
j.hartmann98/100
Cross-check: Medutest and PeptideMeter, same lot, agreement to 0.2 points. Both agree with the declared figure. Record covers one lot only.
am.ekstrom94/100
Synthesis record supplied on request, attached rather than summarised, resin and purification step named. Independent verification of the record itself not attempted.
c.kjaer89/100
Reconstitution: 11 of 12 units clear on contact, 1 transient haze resolving on standing. Single consignment. Logged as an observation, not a defect.
t.nakamura97/100
Content assay 10.05 mg against a 10 mg declaration. Single lot. Cold chain intact at arrival, day 8.
k.bakken98/100
Retention: chromatogram reissued for a lot released 14 months earlier, from supplier records, no justification required. Record covers the request, not the population.
ha.mwangi97/100
Repeat purchase of one line at an 11-month interval. Same declared method, results 0.1 points apart. Drift not detected at this resolution.
Block 12
Most recent records
Block 13
Contributor annotations on SinoPep records 309
Annotations are this index's only discussion surface: signed technical comments attached to a specific record by a named contributor. They are not moderated for agreement with the index's own arithmetic. The most recent on SinoPep material are below, each linked to the record it sits on.
Purity 99.24 % with maleimide dimer at 0.49 % nearby. Read the pair together: the purity figure and its nearest neighbour are two views of one integration decision.
Half of all mass disputes are unit errors. Daltons against atomic mass units, average against monoisotopic, ppm against millidaltons: check which pair is on the report before reading -36.5 ppm as a discrepancy.
At this mass the monoisotopic peak may not be the most intense peak in the cluster. Picking the apex instead of the monoisotopic peak produces a systematic positive error of roughly the size flagged here.
Instrument class matters here. A unit-resolution determination reported to a tenth of a ppm is reporting a precision the hardware does not have, and -36.5 ppm on such a determination is largely noise.
Provenance handles supplier selection. It does not handle submitter selection, which is the larger confounder and the one the index cannot measure.
Both the theoretical and the observed monoisotopic mass are in the published dataset, so the ppm figure can be re-derived rather than trusted. That is the intent of publishing both.
Reported as signed ppm, which is the right convention: direction carries information about calibration that a modulus discards.
Flow rate is the free variable most operators never touch. Halving it on an isocratic hold across the pair is a fifteen-minute experiment with a definitive answer.
Every annotation the index holds on SinoPep material sits on its own record; the full set is reachable from the record listing and from each contributor's page. To read them against what SinoPep itself publishes, open sinopep.net → alongside.
Block 14
Where to buy SinoPep
SinoPep Biotechnology (Changzhou) Co., Ltd. sells direct from sinopep.net. Everything on this page describes lots the index has already seen; the certificate that matters is the one that arrives with the vial you order, and the lot code on it should match the vial. Ask for the lot-specific document rather than the batch-level summary, and ask for the integration report if you intend to reconcile the figure yourself.
Go to the SinoPep store at sinopep.net →
Marked nofollow and sponsored. The index is paid nothing for it, takes no commission, and a link is not an assessment. Research compounds. Not medical advice. Nothing on this site is a safety assessment and nothing on it is approved for human use.