Internal Standard for AB SIM Back Catalog number: 94541 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 674159 4,4'-DDT, 100mg Price on request 673461 Trichlorfon, 100 µg/ml, Acetonitrile, 5ml Price on request H946485 3-Hydroxy-2-methylbutanoic Acid, 100mg Price on request