Surrogate Standard Stock Solution, 1.2ml, nonane Back Catalog number: EPA-23SSS Manufacturer: Wellington Laboratories Availability: 1 week Price on request - + Recommended 678471 Bis(2-ethylhexyl) phthalate, 100 µg/ml, Acetone, Price on request 2518.7-100-ME Theophylline, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 58-55-9 Price on request 8943.11 Propachlor, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 1918-16-7 Price on request