DMSO-YUJI

Explore a documented DMSO-containing ketoconazole coupling process, including downstream isolation and recovery of the mother liquor.

A documented DMSO application in NSAID ester-derivative preparation, distinct from synthesis of the parent anti-inflammatory drug.

Understand PPI sulfide-to-sulfoxide oxidation, control of sulfone formation and how the oxidation differs from DMSO solvent use upstream.

DMSO can serve as a solvent in a documented esomeprazole sulfide-intermediate coupling step, before oxidation to the sulfoxide.

Explore DMSO use in steroid intermediate synthesis, including sulfur-ylide epoxidation in a documented spironolactone route.

Understand the DMSO ICH Q3C limit, its Class 3 classification, the 5,000 ppm reference and how daily product dose affects residual solvent assessment.

Practical DMSO storage guidance covering moisture pickup, dry nitrogen blanketing, prompt resealing and water limits of 100 or 50 ppm for sensitive reactions.

Compare DMSO, NMP, DMF, DMAC, acetonitrile, acetone, THF and DCM, with practical notes on properties, exposure controls, recovery and process qualification.

Regulatory and process considerations for switching to dimethyl sulfoxide Dimethyl sulfoxide (DMSO, CAS 67-68-5) is a highly polar, water-miscible dipolar aprotic solvent with a relatively high boiling point (189 °C) and low acute toxicity. As EU regulation tightens around the nitrogen-containing solvents N-methyl-2-pyrrolidone (NMP) and N,N-dimethylformamide (DMF), manufacturers in battery, polymer, and pharmaceutical processing are … Read more