EPA Method 601 Internal Standard Back Catalog number: 19094 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9461.10-100K-ME Spermine, 100mg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 71-44-3 Price on request 0676.21-100-IO 5ß(H)-Pregnane, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 481-26-5 Price on request 50781 Alkalinity as Calcium Carbonate Price on request