EPA Method 500 Series Internal Std #4 Back Catalog number: 30003 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3321.6-100-CY delta-HCH (BHC) Price on request 680042 MGK 264 (technical mixture), 250mg Price on request 673137 2-Chloro-6-methylphenol, 100mg Price on request