Pyrene Back Catalog number: X9186 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676882 Praziquantel, 250mg Price on request 93616 Semi-Volatile Standard Price on request 11695.12-100-IO 2,3,4,4'-Tetrachlorobiphenyl ,100 µg/mL,isooctane,1mL, Price on request