1,4-Naphthoquinone Back Catalog number: 70412 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 44021 4-Bromofluorobenzene Price on request 9407.15-100-ME Metoprolol-d7 hydrochloride (isopropyl-d7), 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 1219798-61-4 Price on request 11435.20-100-IO Di-p-tolylphenyl phosphate-d14 (p-tolyl-d7),100 µg/mL,isooctane,1mL, Price on request