Method 1640 Tuning Standard Back Catalog number: 52147 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3427.15-100 Isofenphos, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 25311-71-1 Price on request 31091 Carbon tetrachloride Price on request 60030 Acid Extractables - MISA Price on request