# peptidepurityreport.com

> An assay index for peptide certificates of analysis. It reads one published catalog, tested by Titreon Analytical, line by line, and records beside every result what the measurement establishes and where it stops. Compiled 2026-09-01, build PPR-20260901, revision r01.

peptidepurityreport.com is a measurement record, not guidance. It runs no laboratory, holds no stock, and ships nothing. It converts no measurement into advice, and a purity figure here is a statement about a batch and not about a person. Material described on the linked vendor pages is research grade, holds no marketing approval as a medicine, and has been evaluated by the FDA for neither safety nor effectiveness.

Affiliate: this site is paid a commission when a vendor sale starts from a link in the file. Vendor links carry the attributes nofollow, sponsored and noopener. Sources that pay nothing carry noopener alone. The notice is written against the FTC endorsement guides at https://www.ftc.gov/business-guidance/resources/ftcs-endorsement-guides-what-people-are-asking

## What this file holds
- The fourth column. Beside every certificate line sits a second sentence naming what the same measurement leaves untouched. A proportion holds no identity, an identification holds no proportion, and each boundary is stated as a scope.
- A keyed second measurement, read as a general practice. Peptara Labs states that each of its published second laboratory endotoxin reports carries a verification key, and that the key can be verified at janoshik.com/verify. This site ran no such check, because the host refused the request during the pull, and a refused request is a fact about the request.
- A fetch ledger that publishes its own failures. Every source opened for the build is recorded with its outcome, the two refused requests included.

## The record read
One vendor catalog of 16 research grade items, every batch tested by Titreon Analytical, described on the vendor pages as a third-party laboratory with its quality system aligned to ISO/IEC 17025:2017, not itself accredited. 14 of 16 items carry a published certificate, and two sit pending with testing under way. Chromatographic purity is measured by HPLC against a release criterion written as not less than 95.0 percent. Measured purity across the published catalog runs 98.6 to 99.6 percent, and the vendor homepage summarises that catalog spread as a single 99% average purity figure.

## Pages
- / : Peptide Purity Testing: What Each Assay Establishes and Where It Stops. The flagship. A nine line assay matrix, the fetch ledger, and a ten question log.
- /assays/hplc-purity/ : HPLC purity is an area percentage, reported against a release criterion, and it names no species.
- /assays/lc-ms-identity/ : LC-MS confirms identity by mass, and reports no proportion.
- /assays/bacterial-endotoxin/ : the endotoxin line covers one class of contamination, on the one batch it names.
- /assays/heavy-metal-panel/ : five named elements, and what Not Detected records.
- /assays/fentanyl-screen/ : a screen returns a flag, a confirmation returns an identification.
- /second-measurement/ : two laboratories, and the key that travels with the second report.
- /testing-laboratories/ : the three testing pages this build opened, titles quoted where recorded.
- /container-to-record/ : tying a unit in hand to its certificate, and the vendor's 60 day term.
- /methods/ : how a row is built, the full fetch ledger, and the correction policy.
- /about/ : who compiles this index, and the three things it is not.
- /disclosure/ : the commercial relationship in full, with the FTC standard.

## Not on this domain
No amounts of material, no vial sizes, and no handling instructions. No rating, no ranking, and no laboratory scored against another. No claim that the testing laboratory holds a standard: the published standing is stated as aligned to ISO/IEC 17025:2017, not itself accredited. No position numbers for search results. One owned property is named, peptaralabs.io, and no other.