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ISO/IEC 17025 Accredited Testing

Research-Grade Peptides.Independently Verified.

Every batch tested across 8 categories by an accredited third-party lab - full results published, not just a purity number.

Every batch. Eight-point panel.

Independently Verified

99%+Purity Guaranteed
8Quality Checks
100%Third-Party Verified

Appearance

QC Verification

A direct visual inspection of the sealed vial and its contents - checking for correct color, consistent texture, and the absence of any visible particulates or defects before anything else is tested.

Why it matters: It's the simplest check on this panel, and also the first line of defense. A vial that doesn't look right on inspection doesn't move on to the rest of the panel.

Purity (HPLC)

QC Verification

Measures the percentage of active compound relative to everything else in the vial, run on high-performance liquid chromatography - the analytical standard the industry actually trusts.

Why it matters: A purity percentage with no test behind it is just a claim on a label. HPLC is what turns that number into something you can check.

Net Peptide Content

Reported Value

Reports the actual peptide mass per vial in milligrams, measured directly by the lab rather than assumed from the label claim.

Why it matters: Label claims and actual fill can drift apart. This is the number that tells you what's really in the vial, independent of what the packaging says.

Identity Confirmed

QC Verification

Confirms the vial contains the compound it's labeled as - not a similar-sounding substitute - verified against a reference standard by the testing lab.

Why it matters: Wrong compound means wrong research, full stop. Identity confirmation is what separates a labeled vial from a verified one.

Heavy Metals Screened

QC Verification

Screens for lead, arsenic, cadmium, and mercury - contamination that can be introduced during synthesis or downstream handling.

Why it matters: Synthesis catalysts can leave metal residue behind. This confirms none of it carried through to the sealed vial.

Sterility Tested

QC Verification

Confirms the sealed vial shows no microbial growth when cultured under controlled laboratory conditions.

Why it matters: Contamination isn't visible to the eye or detectable by smell. Culturing is the only reliable way to confirm a vial is actually sterile.

Endotoxin Tested

QC Verification

Measures bacterial endotoxin levels - byproducts that can persist even after a batch has already passed sterility testing.

Why it matters: Endotoxins can survive sterilization intact. Testing for them separately catches what a sterility check alone can miss.
Verified by ILS Laboratories - an independent, accredited third-party lab. View our testing standards →
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Full 8-point panel testing on every batch, every SKU.

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Why Catharos Labs

What Sets Us Apart

Typical Seller
Purity % only
No lab attribution
No way to confirm
Catharos Labs
Full 8-point panel, every batch
Independently verifiable, accredited lab
Live verification link on every certificate
Here's what that looks like in practice

Full 8-Point Panel

Appearance, purity, net content, identity, heavy metals, sterility, endotoxin, and an adulterant screen - run on every batch, not spot-checked.

Independently Verifiable

Every COA links to a live, scannable record at ILS Laboratories - nothing published here that can't be checked directly at the source.

Shipping Guarantee

Every order is protected against damage, loss, or theft in transit. If something goes wrong, we make it right at no cost to you.

99%+ Purity Guaranteed

Every batch is tested to confirm 99%+ purity before it ships - verified by HPLC, not just claimed on the label.

Wholesale & Partner Pricing

Bulk pricing for larger orders, plus a partner program for businesses that want to resell under their own branded COA.

Research-Only, Compliant by Design

Age-gated, RUO-labeled, and logged at checkout - built to keep every order squarely within research use.

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⚠ FOR RESEARCH PURPOSES ONLY - Products are not FDA approved and are intended strictly for laboratory research use.