Methotrexate Back Catalog number: 72209 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended XA10205100WA AMPA 13C 15N, 100µg/mL in Water, 1ml Price on request 51064 ASTM D-4815 Calibration Mix #1 Price on request 70376 Strychnine Price on request