Tungsten (W) Back Catalog number: 57074 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended S-4252-ASS-IOX5 Aromatics Calibration Standards Kit (3 Internal Standard Version) 24 Analytes + 3 ISTD, each Vol.% as listed in isooctane; units: 5x1mL Set, one of each Std. 1-5 + opt. 1x1mL (Std. 6) To these calibration standards are 3 deuterated Internal Standards Price on request 0951.9-K-IO 7-Methylbenzothiophene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 14315-15-2 Price on request 8986.4-K-AN N-Nitrosopiperazine, 1000µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 5632-47-3 Price on request