Perchlorate Level 1 Back Catalog number: 59339 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1732.30-10MG 8,16-Pyranthrenedione, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 128-70-1 Price on request 11853.19-100-MEX5 Propargite,100 µg/mL ,MeOH,1mL, Price on request 3584.17-K-IO 2,4-Diethylthioxanthone, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 82799-44-8 Price on request