Napthol Yellow Back Catalog number: 72598 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended YA05000061ME VOC-Mix 61, 1000-10000µg/mL in MeOH, 1ml Price on request 92285 Aromatic Internal Standard Price on request 0984.20-100-IOX10 d2 C20 Triaromatic Sterane, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-10, Cas.no. 205529-79-9 Price on request