EPA Method 500 Series Internal Standard Back Catalog number: 31004 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 97279 Aliphatic Internal Standard Price on request C16667000 Pyroxsulam, certified, 0.1g Price on request CLM-6779-1.2 Triclosan (13C12, 99%) 100 µg/mL in Nonane, 1,2ml Price on request