- 01Analytical science · 3 min read
How Laboratories Measure Peptide Purity: HPLC and the Meaning of “99%”
Understand HPLC purity, chromatographic peak areas and why a 99% result does not prove identity, amount, sterility or clinical safety.
- 02Analytical science · 3 min read
How Scientists Verify Peptide Identity: Molecular Mass, MS and LC-MS
Learn how molecular mass, mass spectrometry and LC-MS support peptide identity, and why purity or a matching mass alone may not settle every question.
- 03Analytical science · 3 min read
Understanding a Peptide COA: Authenticity, Lot-Specific Testing and Limits
Learn what a certificate of analysis should document, how to evaluate its connection to a sample or lot, and what it cannot prove.
- 04Analytical science · 2 min read
What Is Endotoxin Testing?
Understand bacterial endotoxins, what endotoxin tests measure, and why a result is different from sterility or a general purity claim.
- 05Safety & regulation · 2 min read
What Does “Research Use Only” Mean, and Does It Mean a Product Is Safe?
Understand what a research-use label communicates, what it does not prove, and why a research material is not automatically a medicine.
- 06Safety & regulation · 2 min read
Are Peptides FDA-Approved? Prescription, Compounded and Research Products
Understand product-specific FDA approval and the differences between approved prescription medicines, compounded preparations and research materials.
Reading journey
What does “99% pure” leave out?
Follow a label through identity, purity, certificates and the limits of a research-use designation.
