Internal Std., 4000µg/ml Methylene Chloride, 1ml Back Catalog number: 10009 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 66171 2,2',3,3',4,4',6-Heptachlorobiphenyl (171) Price on request 2780.9-100 Ethion, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 563-12-2 Price on request 9697.10-10MG 1,4-Dihydroxynaphthalene, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 571-60-8 Price on request