Independent side-by-side comparison of BioTech Peptides and Hangzhou Qihang Xingcheng — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Hangzhou Qihang Xingcheng has more published third-party tests (2 vs 0); BioTech Peptides carries more community reviews (567).
Every figure below is either measured by an independent laboratory or read from the vendor's own website, and the source is named against it. PeptideAtlas is not affiliated with either vendor.
BioTech Peptides has no independent Janoshik assays on file. Hangzhou Qihang Xingcheng: 2 independent Janoshik assays, across 2 substances, median measured purity 99.8%, most recent 2026-04-13.
| Attribute | BioTech Peptides | Hangzhou Qihang Xingcheng |
|---|---|---|
| Third-party tests | None published | 2 tests, avg purity 99.8% |
| Community rating | 4.4/5 (567 reviews) | No reviews |
| COA available | Yes | No |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Year established | 2016 | Unknown |
| Substance | BioTech Peptides | Hangzhou Qihang Xingcheng |
|---|---|---|
| Tirzepatide 20mg(TR20) | Not tested | 99.64% (1 assay, latest 2026-04-13) |
| Tirzepatide 60mg(TR60) | Not tested | 99.90% (1 assay, latest 2026-02-19) |
| Checked | BioTech Peptides | Hangzhou Qihang Xingcheng |
|---|---|---|
| Certificates of analysis | 41 published on the site | Not stated |
| Products listed | 89 | Not stated |
| Public pricing | Listed on the site | Not stated |
| Payment methods | Credit Card | Not stated |
| Ships to | United States, Worldwide | Not stated |
| Research-use-only notice | Published | Not stated |
Hangzhou Qihang Xingcheng. BioTech Peptides has no independent Janoshik assays on file. Hangzhou Qihang Xingcheng: 2 independent Janoshik assays, across 2 substances, median measured purity 99.8%, most recent 2026-04-13. These are third-party Janoshik assays published against the vendor, not the vendor's own certificates.
BioTech Peptides publishes 41 certificates of analysis on its own site, and we have not read Hangzhou Qihang Xingcheng's site. A published COA is the vendor's own document; the assay figures elsewhere on this page are independent of it.
BioTech Peptides states it ships to United States, Worldwide, and Hangzhou Qihang Xingcheng does not state one. Both are read from the vendors' own sites.
Full profiles: BioTech Peptides, Hangzhou Qihang Xingcheng.
Full lab-test records: All 2 Hangzhou Qihang Xingcheng lab tests.
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