Method 1640 Tuning Standard Back Catalog number: 53147 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673636 Methamidophos, 100 µg/ml, Ethyl acetate, 5ml Price on request C20590400 7H-Benzo[c]fluorene, 10mg Price on request C12724500 2,4-Dimethylaniline, certified, 0.5g Price on request