Method 1640 Tuning Standard Back Catalog number: 52147 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 71973 2,2-Bis(4-chlorophenyl)ethanol Price on request 0043.18-100-T 7-Nitrobenz[a]anthracene, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 20268-51-3 Price on request C15100000 Methylmercury-chloride, certified, 0.1g Price on request