Chlorophyll A/B Standard Back Catalog number: 71592 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70833 Siduron Price on request 0298.19-50-T 1-Methylbenz[a]anthracene, 50 µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 2498-77-3 Price on request DF-123678-S 1,2,3,6,7,8-Hexachlorodibenzofuran, 1.2ml x 50ug/ml, nonane Price on request