Multi-Elements Mix Back Catalog number: 50123 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 50793 Total Kjeldahl Nitrogen as N Price on request 9871.16-50-IO 4,10-Dimethylphenanthrene, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 23189-63-1 Price on request 1647.7-1MLX5 Pentafluorobenzoyl chloride, neat, Solvent-neat, Unit 1mL, # of units-5, Cas.no. 2251-50-5 Price on request