Methotrexate Back Catalog number: 72209 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673564 Endosulfan-sulfate, 100 µg/ml, Ethyl acetate, 5m Price on request 93314 USGS 8022 Standard Price on request 675248 Proquinazid, 100 µg/ml, Acetonitrile, 5ml Price on request