Each freeze and thaw concentrates a solution, moves its pH and adds an interface. How to size aliquots so the answer is one cycle, and what to record.
Read the post →
Purity needs a separation, which no strip or handheld device does. What those tests detect, which bench checks work, and what a certificate replaces.
Read the post →
What degrades in a sealed dry vial, why residual water controls it, what accelerated studies can predict, and retest versus expiry dates.
Read the post →
Every Pepstral certificate as one table: purity 99.55 to 99.90%, fills a median 3% over label, six lots under, the August method change, and a CSV.
Read the post →
Vilon is the dipeptide Lys-Glu, mass 275.3. Lot VILON20-0528 reports six tests including sterility, 20 mg is 72.6 micromoles.
Read the post →
Thymosin alpha-1, 28 residues, mass 3108.3. Lot TA110-0803 line by line: LC-MS/MS identity, 99.78% purity, 10.87 mg, endotoxin, metals.
Read the post →
Thymulin is a nonapeptide, mass 858.9; Thymalin names a thymus extract. The vial labelled Thymalin has a certificate mass of 858.8. What that means.
Read the post →
Testagen is Lys-Glu-Asp-Gly, mass 447.4. Lot TESTA20-0528 line by line, how the mass confirms the sequence, micromoles in 20 mg, and the literature.
Read the post →
SS-31 is D-Arg-Dmt-Lys-Phe-NH2, mass 639.8. Lot SS31-10-0803 line by line, handling, and its FDA approval as elamipretide in September 2025.
Read the post →
One certificate, two identities: Semax at 813.9, Selank at 751.9, contents 5.15 and 5.37 mg, purity 99.76%. Which peak is which and the molar ratio.
Read the post →
Pinealon, Glu-Asp-Arg, 418.4, against epithalon, Ala-Glu-Asp-Gly, 390.3: sequences, certificates side by side, molar amounts.
Read the post →
Pinealon is Glu-Asp-Arg, mass 418.4, a 20 mg vial at $60. Lot PINE20-0803 line by line, molecules in 20 mg, what the research measured, and handling.
Read the post →The blog covers buying, handling and research-design questions as they come up. The evergreen material lives in the guides: reading a certificate of analysis, storage and stability, one research guide per compound and the glossary.
New posts publish to the RSS feed. Every post is written for laboratory research use only and links to the lot certificate for any product it mentions.
One email when a new certificate is published, when a sold-out compound is back, or when a new compound is added. About twice a month, nothing else.