Sulfur Standard Back Catalog number: 93916 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended P838312 Propylthiouracil-d5, 2,5mg Price on request 90224 Internal Standard Solution Price on request 18000-1810-100AN5 Metformin-HCl, 100µg/ml in Acetonitrile, 5ml Price on request