EPA Method 527 Surrogate Standard Back Catalog number: 95053 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended RM0691 Ferbam Price on request I0843 Isoproturon, >98%, 5g Price on request 54176 Hexavalent Chromium (Cr+6), 10mg/mL in H2O, 500ml Price on request