BTEX (50 µg/mL) Back Catalog number: 98691 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 672837 Diafenthiuron, 250mg Price on request 95406 Aroclor 1254 & Tetrachloro-m-xylene Price on request 92713 Chlorinates Standard Price on request