525 Internal Standard Back Catalog number: 94212 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675089 Metolachlor, 100 µg/ml, Acetonitrile, 5ml Price on request H828602 Hydroxy Atrazine-d5, 1mg Price on request 98557 Formaldehyde (5 ppm) Price on request