Method 1640 Tuning Standard Back Catalog number: 53147 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 73167 cis-9-Octadecenoic acid Price on request DF-1246-S 1,2,4,6-Tetrachlorodibenzofuran, 1.2ml x 50ug/ml, nonane Price on request 10534.28-100-IO 25-Hydroxyvitamin D2 (95%) Price on request