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How to read a Janoshik test report, field by field

Match the batch to your vial's lot, note the tests run, read each result, then open the lab's copy with the task number and key.

By Published Last updated 4 min read

Uses the lab reports of the 11 tested lots on this site

A clipboard with a handwritten list of steps on a wooden table
A clipboard with a handwritten list of steps on a wooden table. Photo: RyanT27, CC0, via Wikimedia Commons

Key takeaways

  • Check the batch first: the lot code on the report must match the lot printed on your vial.
  • A report covers only the tests listed under Tests requested. A purity report says nothing about endotoxin.
  • The task number and the unique key open the lab's own copy, so you can check that nothing was changed.

A lab report answers a few precise questions. This guide takes one real report from our COA library and reads it one field at a time.

One real report

A certificate of analysis, or COA, is a laboratory's record for one batch. ICH Q7, the international guideline for making active ingredients, says a certificate should list each test, its acceptance limits and its numerical results. It should also be dated and signed[1].

Janoshik Analytical, the independent lab that tests BP's lots, issues one report per test, so each lot has several. Figure 1 is one of them: the content and purity report for 6HK-CU, batch GH-692, task #137344[2].

Janoshik Analytical test report, task 137344, batch GH-692, with nine numbered parts
  1. Task number. The lab's own number for this one test.
  2. Dates. When the test was ordered and when the sample reached the lab.
  3. Sample and batch. What the client sent, and its lot code. The batch must match the lot on your vial.
  4. Tests requested. What the lab was asked to measure. The report covers only these tests.
  5. QR code. It opens the lab's own copy of this report.
  6. Results. The numbers. Here: the measured content in mg and the HPLC purity.
  7. Comments. The lab's notes. Empty here; on the LC-MS report the lab names what it found.
  8. Analysis date and signature. When the analysis was done, signed by the lab.
  9. Unique key. With the task number, it opens the lab's copy at janoshik.com/verification.
Figure 1. The content and purity report for batch GH-692 (6HK-CU), task #137344, with its nine parts numbered. Source: Janoshik Analytical, from the original PDF in the COA library.

Task number, dates and batch

The task number (1) is the lab's own reference for this test. The dates (2) show when the test was ordered, 9 Apr 2026, and when the sample arrived, 13 Apr 2026. The analysis date is at the bottom (8): 15 Apr 2026.

The sample and batch fields (3) say what the client sent. The batch is the lot code, and it is the first thing to check: it must match the lot printed on your vial. A report for another lot, or a report with no lot code, says nothing about your vial.

Tests requested: what the report covers

Under Tests requested (4) the lab writes what it was asked to measure. The report covers those tests and nothing else. This one answers two questions: how much peptide is in the vial, and how pure it is. It says nothing about endotoxin, heavy metals or microbes. Those have their own reports, each with its own task number (Figure 2).

TestTask, dateResult
Content and purity#13734415 Apr 202645.30 mg, 99.680% purity
LC-MS screening#13734516 Apr 2026Pass
Endotoxin#13734617 Apr 2026<10 EU/vial (pass)
Heavy metals#13734815 Apr 2026As, Cd, Pb, Hg not detected
Microbial counts#13734728 Apr 2026TAMC pass, TYMC pass
Figure 2. The five reports for batch GH-692 (6HK-CU). Each test has its own task number and date. Source: Janoshik Analytical reports in the COA library.

Results and comments

Results (6) holds the numbers: 45.30 mg measured and 99.680% HPLC purity. The purity article explains how the percentage is calculated, and the content article explains why the measured milligrams differ from the label.

Comments (7) is empty on this report. The LC-MS screening report for the same batch uses this field. There the lab wrote: "LCMS analysis identified the presence of mannitol, 6HK-CU, and degradation products. LCMS spectra are attached. No significant contamination detected."

Date, signature and the key

The analysis date and the signature (8) close the report. The unique key at the bottom (9) and the task number together open the lab's own copy at janoshik.com/verification[3]. The QR code (5) opens the same copy directly: on this report it encodes the lab's page for task #137344. Comparing the lab's copy with the file you were given is the strongest check a buyer has. How to check a report at the lab

What a report cannot tell you

A third-party test report describes the sample the lab received, measured on the day of the analysis. It is not a manufacturer's release certificate: it gives the measured numbers, mostly without pass or fail limits. It does not cover tests that were not requested, other lots, or what happened to a vial after the test. Storage matters for that, and the storage article explains why.

Check it on real reports. The COA library has the full lab reports for 11 lots, with the original PDFs and links to the lab's own copies. Open the COA library

Sources

  1. ICH. Q7: Good manufacturing practice guide for active pharmaceutical ingredients. Step 4 version, 10 November 2000. Section 11.4, Certificates of Analysis. database.ich.org (PDF)
  2. Bali Peptide Supply. COA library: every lab report for the lots sold on this site. Reports issued by Janoshik Analytical, with their task numbers, keys and original PDFs. balipeptidesupply.com/coa/
  3. Janoshik Analytical. Verification of test reports. Verification page (task number and unique key) and the lab's copies of BP's reports. janoshik.com/verification

Each source was read in its own document on 16 Oct 2026. Numbers about BP's lots come from the reports in the COA library.

How this article was made

Written by Bali Peptide Supply from the sources listed above, each read in its own document on 16 Oct 2026. Every number about our lots comes from the Janoshik Analytical reports in the COA library, read by the site build, not typed by hand. The lead photo is from Wikimedia Commons under a free licence.

BP sells research materials for laboratory use only. This article explains laboratory testing and lab reports. It is not medical advice and not instructions for use.

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