EPA Method 525 - Internal Standard Back Catalog number: 30031 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677361 AHTN (Tonalid), 10.0 µg/ml, Cyclohexane, 5ml Price on request 677974 Dichlorvos, 100 µg/ml, Toluene, 1ml Price on request 675054 Dimethachlor OA, 10mg Price on request