PAH Standard Back Catalog number: 91531 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8421.4-10MG Desphenyl chloridazon, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. Price on request 674259 Halfenprox, 10mg Price on request 1087.18-10MG Benz[a]anthracene-d12, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 1718-53-2 Price on request