EPA Method 525 - PAH Standard Back Catalog number: 19362 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 9055.6-K-IP 3,4,5-Trichlorocatechol , 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 56961-20-7 Price on request 93967 tert-Butyl hydroquinone (TBHQ) Price on request 0667.27-50-IO C27 1-Methyl triaromatic sterane, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 80382-27-0 Price on request