Method 200.8/1638/1640 Internal Standard Back Catalog number: 53145 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9400.19-25MG Doxepin hydrochloride Price on request 51055 ASTM D-5441MTBE Contaminant High Concentrate Price on request 675095 Sodium p-n-dodecylbenzenesulfonate, 10mg Price on request