Internal Reference Standard Back Catalog number: 52187 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677148 Diphenyltin dichloride, 1000 µg/ml, Methanol, 5m Price on request 674756 Isofenphos-oxon, 10mg Price on request 59485 Common Anions EPA 300.1Mix Price on request