Method 1640Mix A Back Catalog number: 53146 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 94007 Semi-Volatile Standard Price on request 673092 L-Ascorbic acid 6-palmitate, 250mg Price on request PN-68S 1,2,3,5,6,8-Hexachloronaphthalene, 1.2mL x 50ug/mL, nonane Price on request