10% off your first order with code XS10·Same-day dispatch before 2PM ET
Research-grade reference materials

The standard for
serious research.

Third-party verified peptides, shipped with a certificate of analysis. Documented material from a source you can trace.

★★★★★ Trusted by independent research labs
99.4%Avg. lot purity
32Compounds in stock
24hSame-day dispatch
99.4%
Average lot purity
32
Compounds in stock
24h
Same-day dispatch
≥99% HPLC PurityThird-Party TestedCOA Every BatchISO-Aligned US FacilitySame-Day DispatchLot-Traceable
New arrivals

Fresh to the catalog.

The latest characterized compounds — drag to browse, each batch HPLC-verified and shipped with a COA.

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Most requested

Bestsellers.

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Why XS

Verified to spec. Every batch.

Purity claims mean nothing without proof. Here's what ships with every vial.

Third-Party Tested

Independent HPLC + mass-spec analysis on every batch, run by an outside lab — not us.

COA For Each Batch

A batch-specific Certificate of Analysis ships with every order, traceable by lot number.

99%+ Verified Purity

Reverse-phase HPLC confirms ≥99% purity and identity before a batch is ever released.

ISO-Standard Process

Synthesized and handled in US facilities under ISO-aligned, fully documented controls.

From the research community

Trusted by researchers.

★★★★★

"Consistent lot-to-lot results. The COA matched the HPLC spec exactly — that's the documentation standard our lab requires."

JR
J. Richardson
Independent Research Scientist
★★★★★

"Finally a supplier that publishes batch data without being asked. Purity spec held across three consecutive orders."

KT
K. Torres
Biochemistry Research
★★★★★

"Fast shipping, clean documentation, and the reconstitution guide was a thoughtful touch. Already placed two reorders."

MA
M. Alvarez
Lab Coordinator

Characterized peptides, engineered to spec — third-party verified, batch after batch.

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