Calcium Hardness Back Catalog number: 54143 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3172.24-K-IO Methyl tricosanoate, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 2433-97-8 Price on request S-4323-K-T Nitro-PAH Mixture 1 1106,14 9-Nitroanthracene [602-60-8] 1278,16 2-Nitrofluoranthene [13177-29-2] 0025,16 3-Nitrofluoranthene [892-21-7] Concentration: 1000 ppm in Toluene Units: 1mL ampoules Price on request 0385.13-K-T Acridine-d9, 1000µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 34749-75-2 Price on request