High-purity pharmaceutical reference materials and synthesis services — trusted by research labs, QC departments, and regulatory teams worldwide.
API impurities are trace-level chemical substances present in active pharmaceutical ingredients that must be identified, quantified, and controlled as per ICH Q3A/Q3B guidelines. Swapreen Pharma synthesizes and supplies a comprehensive range of pharmaceutical API impurities — including process-related impurities, degradation products, and genotoxic impurities — at the highest achievable purity levels. Each batch is fully characterized using HPLC, NMR, mass spectrometry, and IR spectroscopy, and is supplied with a detailed Certificate of Analysis (CoA). Our impurities portfolio spans widely prescribed drug classes including antibiotics, antidiabetics, NSAIDs, cardiovascular agents, and antifungals.
Working standards — also called in-house reference standards — are used daily in pharmaceutical quality control laboratories as cost-effective alternatives to expensive pharmacopoeial primary standards. Swapreen Pharma produces working standards for APIs and their related impurities, calibrated against primary reference standards and supplied with assigned purity values traceable to international pharmacopoeias. Our working standards are ideal for routine HPLC quantitation, dissolution testing, content uniformity assays, and instrument calibration. They are manufactured under stringent quality systems and are suitable for both GMP and non-GMP laboratory environments.
Pharmaceutical intermediates are chemical compounds formed during the synthesis of an active pharmaceutical ingredient that must undergo further transformation before becoming the final API. Swapreen Pharma manufactures and supplies a broad range of drug intermediates used in both clinical-stage drug development and commercial API production. Our intermediates are produced with tight specification control and full traceability, making them suitable for incorporation into regulated manufacturing processes. We also offer custom intermediate synthesis for clients requiring specific building blocks, chiral intermediates, or protected functional group variants not available commercially.
Our custom synthesis service is designed for clients requiring compounds outside standard commercial catalogues — whether novel research molecules, rare impurity standards, proprietary intermediates, or isotopically labelled analogues. Our team of experienced organic chemists evaluates each project individually, proposes the most efficient synthetic route, and delivers the target compound at the agreed purity and quantity within the required timeline. We operate under strict confidentiality agreements and offer full IP protection. Projects range from milligram-scale feasibility work for discovery teams to multi-kilogram production for clinical or commercial supply.
Our catalogue covers hundreds of compounds — but if yours isn't listed, our team can synthesize it. Submit a quote request and we'll respond within 24–48 hours.