Strontium (Sr) Back Catalog number: 56138 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 71892 4-Methyldibenzothiophene Price on request DF-IS-H Mass-Labelled PCDF Internal Standard Solution, 1.2ml, nonane Price on request 0049.20-100-T 6-Nitrobenzo[a]pyrene, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 63041-90-7 Price on request