Theophylline Back Catalog number: 72031 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 681139 Benz[a]anthracene, 10.0 µg/ml, Cyclohexane, 10ml Price on request 676162 4-n-Octylphenol-mono-ethoxylate, 10.0 µg/ml, Acet Price on request S-4053-7,5K-10T Thiophene in Toluene Units: 5x1mL ampoule, 1x10mL screw-capped bottle Chiron No. Concentration µgS/g (ppm) Wt.% S-4053-0 Blank 0 S-4053-K 1 000 0.1000 S-4053-2.5K 2 500 0.2500 S-4053-5K Price on request