Knowledge hub
Articles from the Molekula editorial team
Coverage of chemistry, regulatory updates, methods, supply-chain insight, and product spotlights. New articles published daily.
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Method-comparison
Evaluating Emerging Bio‑Based Polyether Solvents for Peptide Coupling under REACH 2026
Bio‑based polyether solvents are being assessed as greener alternatives for peptide coupling. Key parameters include polarity, boiling point, REACH‑2026 compliance, and compatibility with common coupling reagents. Data show comparable yields to traditional solvents while reducing hazardous classifications under GHS.
Nov 3, 2026 · 5 min read -
Method-comparison
Copper‑free click chemistry reagents for bioconjugation: DBCO, BCN and tetrazine selection guide
Copper‑free click reagents DBCO, BCN and tetrazine each offer distinct kinetics, stability and functional‑group compatibility. DBCO provides reliable SPAAC with azides (k≈10^2 M⁻¹ s⁻¹), BCN is smaller but slower, while tetrazine–TCO ligation is the fastest (k≈10^4‑10^5 M⁻¹ s⁻¹) but requires strained alkene partners. Choose based on reaction speed, steric constraints and biological context.
Oct 31, 2026 · 6 min read -
Method-comparison
Karl Fischer Titration for Moisture‑Sensitive Reagents: Coulometric versus Volumetric Method Selection
Karl Fischer titration is the standard for quantifying water in moisture‑sensitive reagents. Coulometric KF is suited to low‑level water (<0.1 % w/w) and small sample sizes, while volumetric KF handles higher water contents (0.1–5 % w/w) and larger batches. Selection depends on water range, sample matrix, required precision and equipment availability.
Oct 21, 2026 · 6 min read -
Method-comparison
Choosing Coupling Reagents for Amide Bond Formation: HATU, COMU, T3P and EDC Compared
Amide bond formation can be achieved with HATU, COMU, T3P or EDC, each offering distinct reactivity, cost and safety profiles. HATU and COMU give high coupling efficiency for sterically hindered substrates, T3P excels in minimising racemisation, while EDC is inexpensive but often requires additives to suppress side‑reactions.
Oct 20, 2026 · 5 min read -
Method-comparison
Economic analysis of on‑site versus outsourced production of specialty amino acids
On‑site production of specialty amino acids requires substantial capital investment and ongoing operational costs, while outsourcing converts fixed costs into variable fees and reduces supply‑chain risk. The choice hinges on scale, product value, regulatory burden and long‑term strategic goals.
Sep 28, 2026 · 4 min read -
Method-comparison
Optimising Cryoprotectant Formulations: Comparing Glycerol, DMSO and Ethylene Glycol Performance
Glycerol, DMSO and ethylene glycol are the most widely used cryoprotectants. Their effectiveness depends on concentration, cell type and cooling protocol; DMSO generally offers higher post‑thaw viability but greater toxicity, glycerol is less toxic but requires higher concentrations, and ethylene glycol provides a middle ground with rapid permeation.
Sep 23, 2026 · 4 min read -
Method-comparison
Acetone as a solvent: when to choose it over methanol or ethanol
Acetone is a polar aprotic solvent with high solubility for organic compounds, low viscosity, and rapid evaporation. It is preferred over methanol and ethanol in applications requiring fast drying, minimal hydrogen bonding interference, or high solubility for non-polar compounds. Its lower toxicity and higher boiling point than ethanol make it suitable for lab-scale extractions and cleaning. However, it is more flammable and less biocompatible than ethanol.
Jun 17, 2026 · 4 min read -
Method-comparison
How TCEP differs from DTT as a disulfide reducing agent
TCEP (tris(2-carboxyethyl)phosphine) and DTT (dithiothreitol) are both disulfide reducing agents used in biochemical and chemical applications. TCEP is more stable in aqueous solutions and at higher pH, resistant to oxidation, and effective under denaturing conditions. DTT is less stable, prone to oxidation, and less effective above pH 7.5. Both are used in protein denaturation, sample preparation, and redox studies.
Jun 9, 2026 · 4 min read