Checkmate Labs  /  Testing
Analytical documentation

Every batch, on the record

A certificate of analysis is not a marketing asset. It is the only thing that tells you what is actually in the vial. We publish one for every batch we release and keep the raw chromatograms on file.

Match your product to the list below and download the full report — including the independent testing laboratory, the date of analysis, and the methods used.

0Certificates published
Lowest purity on file
95.0%Lab specification floor
ISO 17025Testing quality system
Current batches

Certificates of analysis

All testing performed by ILS Laboratories, San Diego, CA — an independent facility operating under an ISO/IEC 17025 quality management system. Each certificate can be verified directly with the lab using the access code printed on it.

CL-R3 is retatrutide and CL-T2 is tirzepatide. Certificates issued before these product codes were adopted name the compound rather than the code. The analysis applies unchanged.

Reading a certificate

What the numbers mean

A certificate is only useful if you know which figures matter. These are the fields worth checking before you accept any batch — from us or from anyone else.

  1. COA number

    Every certificate carries a unique COA number. It identifies the exact analysis and is the reference to quote when asking us about a result.

  2. Peptide purity (HPLC)

    The percentage of the target peptide relative to all peptide-related peaks, measured by RP-HPLC area normalization at 214 nm. Our lab specification floor is 95.0%.

  3. Identity (HPLC-RTM)

    Confirms the material is what the label says, by comparing chromatographic retention time against a reference standard. Purity without identity is meaningless.

  4. Net peptide content

    The actual measured mass in the vial, reported against the labelled content. This is how you confirm a vial is filled to specification.

  5. Heavy metals, sterility, endotoxin

    Included on Full QC Panel batches. Elemental impurities by ICP-MS, sterility by PCR, and endotoxin by USP <85> kinetic chromogenic method.

  6. Verification code

    Each certificate carries an access code that can be checked against the testing laboratory's own portal, independently of us.

Not yet published

Batches in testing

The following catalog items do not yet have a certificate posted here. Current batches are either in testing or awaiting release. Request a certificate by email and we will send it if one is on file.

Request a certificate
For research purposes only · Not for human consumption · 21+ only
This is not medical advice