Methotrexate Back Catalog number: 72209 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1087.18-K-TX5 Benz[a]anthracene-d12, 1000µg/mL, Solvent-toluene, Unit 1mL, # of units-5, Cas.no. 1718-53-2 Price on request 3404.9-100 Fenuron, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 101-42-8 Price on request 91564 Air Spiking Standard Price on request