Sildenafil citrate, 100mg Back Catalog number: 681151 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 94869 Minnesota Volatile Standard Price on request 676327 Metformin hydrochloride, 250mg Price on request 689084 18O3-Sodium chlorate, 100 µg/ml water, 1ml Price on request