Research Guide - Terracotta Collection

Research Resource

Peptide Research Guide How to Source, Store & Verify

A comprehensive guide for researchers on evaluating peptide purity, reading COAs, understanding lyophilization, and sourcing high-quality research compounds.

⚠ Research Use Only

All content is for informational purposes only. All compounds discussed are for research use only. Not medical advice. Not for human or animal consumption.

1. Understanding Peptide Purity

Purity is the single most important quality metric for research peptides. It is measured via High-Performance Liquid Chromatography (HPLC), which separates compounds based on their chemical properties and quantifies the target peptide as a percentage of total detected material. For research applications, a minimum purity of 98% is generally considered acceptable, with 99%+ being the gold standard.

2. Reading a Certificate of Analysis

A proper COA should contain: compound name, sequence, and molecular formula; batch number and synthesis date; HPLC purity percentage and chromatogram; mass spectrometry data confirming molecular weight; testing laboratory name and accreditation; and test date.

Red Flag

Be cautious of suppliers who issue their own in-house COAs without independent third-party verification. Kilo. Research uses only independent accredited laboratories for all testing.

3. Lyophilization & Storage

Store lyophilized peptides at -20°C in a frost-free freezer
Protect from light and moisture
Keep in original sealed vials until ready for use
Once reconstituted, most peptides stable for 28 days refrigerated

4. Sourcing Research Peptides: What to Look For

Independent third-party COA with HPLC and mass spec data
99%+ verified purity minimum
Lyophilized form with proper sealing
Cold-chain shipping
Clear research-only policies and legal compliance
Transparent company identity and contact information

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