BTEX (2.0 µg/mL) Back Catalog number: 98515 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79530 Octyl aldehyde Price on request 94031 Surrogate Standard Price on request S-4042-015-10CY Mass Discrimination Test Mixture for ASTM D 5739 150 µg/mL in pesticide grade cyclohexane, 10mL Naphthalene 99 % Fluoranthene 99 % Benzo[ghi]perylene 99 % Price on request