EPA Method 551.1 Internal Standard Back Catalog number: 30103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675097 n-Tridecylbenzene, 100mg Price on request 673318 Haloxyfop-methyl, 10.0 µg/ml, Acetonitrile, 10ml Price on request 675072 Quizalofop-p, 100mg Price on request