QUALITY ASSURANCE

Certificates of Analysis

Every peptide we offer is rigorously tested by independent third-party laboratories. Access detailed COAs for complete transparency on purity, identity, and quality.

Third-Party Verified

HPLC & MS Testing

98%+ Purity Standard

FIND YOUR COA

Search Certificates of Analysis

BPC 157

Lot: PS-2026-001

Mar 4, 2026

GLP-1S

Lot: PS-2026-002

Mar 3, 2026

GLP-3R

Lot: PS-2026-003

Mar 3, 2026

COAs are available for download immediately after your order ships. Check your order confirmation email for direct links.

98%+

MINIMUM PURITY

100%

BATCH TESTED

3RD

PARTY VERIFIED

24HR

COA ACCESS

WHY IT MATTERS

The Importance of COAs

Certificates of Analysis are essential documents that verify the quality and authenticity of research peptides.

Verified Purity

Independent laboratory testing confirms the exact purity percentage of each peptide batch, ensuring you receive precisely what’s documented.

Identity Confirmation

Mass spectrometry analysis verifies molecular weight and structure, confirming the identity of each peptide matches its specification.

Research Integrity

Documented quality data supports reproducible research results and meets the documentation requirements of professional laboratories.

WHAT'S INCLUDED

Inside Every COA

Our comprehensive Certificates of Analysis provide all the data you need for your research documentation and quality assurance requirements.

Purity Analysis (HPLC)

High-Performance Liquid Chromatography results showing exact purity percentage and peak analysis.

Mass Spectrometry (MS)

Molecular weight verification confirming peptide identity and structural integrity.

Batch & Lot Numbers

Unique identifiers for complete traceability and quality control documentation.

Testing Date & Lab Info

Complete testing timeline and independent laboratory identification for verification.

WHY IT MATTERS

The Importance of COAs

Certificates of Analysis are essential documents that verify the quality and authenticity of research peptides.

Verified Purity

Independent laboratory testing confirms the exact purity percentage of each peptide batch, ensuring you receive precisely what’s documented.

Identity Confirmation

Mass spectrometry analysis verifies molecular weight and structure, confirming the identity of each peptide matches its specification.

Research Integrity

Documented quality data supports reproducible research results and meets the documentation requirements of professional laboratories.

OUR PROCESS

How We Ensure Quality

1

Sourcing

Peptides sourced from certified manufacturers with documented synthesis protocols.

2

Testing

Each batch undergoes HPLC and Mass Spectrometry analysis at independent laboratories.

3

Verification

Results reviewed against strict quality standards before product release.

4

Documentation

COA generated and linked to batch number for customer access and verification.

TESTING METHODS

Laboratory Testing Standards

HPLC Analysis

High-Performance Liquid Chromatography for precise purity determination and impurity profiling.

Mass Spectrometry

Molecular weight verification and structural confirmation through MS analysis.

Sterility Testing

Endotoxin and microbial testing for applicable products meeting research standards.

READY TO ORDER?

Quality You Can Verify

Every peptide from Peptides.US comes with a detailed Certificate of Analysis. Browse our catalog of research-grade peptides with verified purity and identity.