Research notes

Documentation

How to Read a Certificate of Analysis

What HPLC purity numbers, lot IDs, and identity testing actually tell you — and the fields worth double-checking before you rely on a report.

7 min read Testing methods

HPLC vs. LC-MS: What's the Difference?

Two testing methods show up on almost every COA. Here's what each one is actually measuring.

6 min read Handling

Storage and Stability Basics for Lyophilized Peptides

Why lyophilized material behaves differently from reconstituted solution, and the temperature mistakes that quietly degrade a sample.

5 min read Sourcing

What to Actually Check Before Trusting a Vendor's COA

A documentation checklist for telling a genuinely transparent supplier from a site that just put a PDF icon next to the price.

8 min read Reference

CAS Numbers, Molecular Formulas, and Why They Matter

A quick primer on the identifiers that let you independently verify what compound you're actually looking at.

5 min read