Internal Standard Back Catalog number: 95592 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673187 Aclonifen, 100 µg/ml, Acetonitrile, 5ml Price on request 59145 Sulfide (S), 1000µg/mL in Water, 20ml Price on request 681364 Furaltadone-Hydrochloride, 100mg Price on request