How We Verify Peptide Purity: Janoshik Testing Explained

1. Match the document to the material

Start with the sample name, nominal vial strength, batch, task number and analysis date. A report for a different strength or batch is not a substitute. Contact us before ordering if the report is missing, unclear or inconsistent with the product details.

Read the original document, not just a badge or marketing summary. Product and laboratory images are illustrative; they are not laboratory evidence.

2. Separate the four testing areas

Purity and vial content

Keep the stated purity percentage separate from the measured amount per vial. Review the method, units and sample description. Do not read a purity percentage as a complete inventory of every possible contaminant or as a universal research acceptance standard; acceptance depends on your protocol.

Sterility / microbial screening

Janoshik describes its TAMC and TYMC service as cultivation testing for microbial presence in the submitted sample. Read the result and stated method. Do not describe that service as a USP <71> test unless the report expressly supports it. Microbial enumeration and pharmacopoeial sterility tests are distinct categories in USP's standards.

Endotoxin

Use the reported units and sample basis when reading the result. Do not compare a per-vial figure with a per-milligram value without checking the basis. A microbial-screening result does not replace an endotoxin measurement.

Heavy metals

Check which elements, units, detection limits and results are actually listed. Do not assume that unlisted elements were tested or that a statement such as below detection means absolute absence.

Testing scope: We do not provide mass-spectrometry testing as part of the programme described here. Only tests explicitly recorded in the applicable report should be assumed.

3. Check authenticity separately from interpretation

Use the issuing laboratory's own verification facility and the task number or key shown on the document. Compare the returned document with the image, including sample, batch and date. An authentic report still needs to match the material and your laboratory's requirements.

Start at Janoshik's verification page. A website link or QR code by itself is not proof that a report was independently checked.

4. Record the limits of the evidence

Reports describe the stated tests on submitted samples. They do not certify every vial, validate all storage and shipping conditions, establish regulatory approval or make a product suitable for human use. Obtain qualified scientific and regulatory advice where your protocol or procurement requires it.

Common report questions

What should I check first on a peptide report?

Match the sample name, nominal strength and batch to the product being considered. Then check the task number, analysis date, stated method, units and reported result. Ask for clarification where a field is missing or inconsistent.

Does our testing programme include mass spectrometry?

No. Mass-spectrometry testing is not part of the programme described here. Do not infer that a method was performed unless it is explicitly recorded in the applicable report. Ask for additional evidence if your laboratory requires it.

Does a purity result establish sterility?

No. A purity result is a separate measurement from microbial screening, endotoxin and heavy-metal results. Read the method and sample scope of each report instead of treating one result as approval for all quality measures.

Does a report establish approval for human use?

No. A report records the stated tests on a submitted sample. It does not establish regulatory approval, clinical suitability or lawful supply for a particular use. These products are offered for laboratory research, not human consumption.

Method references and further reading

Janoshik: TAMC and TYMC service scope · USP: microbiological quality-control standards · Our testing standards and available reports