BTEX Standard Back Catalog number: 90555 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 59565 Arsenic (As) Price on request 2127.12-100-IOX5 Arochlor 1248 , 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-5, Cas.no. 12672-29-6 Price on request 1846.20-1G 1-Pyrenebutyric acid, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 3443-45-6 Price on request