Internal standard 3, 2000g/ml in MeOH, 1ml Back Catalog number: 30069 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 672975 Sulfamerazine, 250mg Price on request 676730 4,4'-Diamino-3,3'-dimethyldiphenylmethane, 100mg Price on request 676774 Propachlor ESA sodium salt, 10mg Price on request