Method 200.8/1638/1640 Internal Standard Back Catalog number: 53145 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677544 4,4'-Dichlorobenzophenone, 100 µg/ml, Acetone, 1 Price on request MET-13035B-100MG Phorate sulfone, 100mg Price on request 681378 2,6-Dichlorobenzamide, 500mg Price on request