Multi-Elements Mix Back Catalog number: 50155 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 59283 Sodium (Na) Price on request 8839.8-K-IO 2-Isobutylpyrazine, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-, Cas.no. Price on request 9195.22-100-ME Sildenafil-d3 (N-methyl-d3-piperazine), 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 1126745-90-1 Price on request