EPA Method 200.8 Internal Standard Back Catalog number: 56332 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 12008.9-10MG 3-Methoxytyramine-d4 hydrochloride,neat,neat,10mg, Price on request 11159.8-10MG Heptaminol,neat,neat,10mg, Price on request 685206 Halauxifen-methyl, 25mg Price on request