Internal Standard Back Catalog number: 95665 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679556 D5-Nalidixic acid, 10mg Price on request ASTM-P-0136-SET IP 391-95 Calibration Curve, in n-Heptane, 4 x 1ml Price on request 10412.4-25MG Sodium DL-3-hydroxybutyrate-3,4,4,4-d4 Price on request