(R)-Zopiclone (CAT. No. CP-Z2005, CAS No. 138680-08-7) is the pharmacologically active R-enantiomer of the racemic hypnotic zopiclone, chemically designated as (R)-6-(5-Chloropyridin-2-yl)-7-oxo-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazin-5-yl 4-methylpiperazine-1-carboxylate, with molecular formula C17H17ClN6O3 and molecular weight 388.81. Also known by its synonym Zopiclone R-Isomer, this chiral reference standard is essential for enantiomeric purity testing, stereoselective method development, and chiral impurity profiling of zopiclone-based formulations. Supplied with a Certificate of Analysis and SDS, it meets the stringent purity and characterisation requirements needed for method validation, ANDA, and DMF filings. Chemicea Pharmaceuticals manufactures and exports (R)-Zopiclone from its India-based ISO 17034 and ISO 17025 certified facility, ensuring consistent lot-to-lot quality and reliable global supply. Explore full technical specifications and request a quote at Chemicea Pharmaceuticals.