Theophylline Alias: dimethylxanthine CAS NO.: 58-55-9 M.F.: C7H8N4O2 M.W.: 180.16 Assay: 99% Appearance: Package:25kg/fibre drum Specification: BP2007/USP31 Usage: Theophylline is a methylxanthine drug used in therapy for respiratory diseases such as COPD and asthma under a variety of brand names