Internal Standard Stock Solution, 1.2ml, nonane Back Catalog number: EPA-23ISS Manufacturer: Wellington Laboratories Availability: 1 week Price on request - + Recommended X9036 Carbon tetrachloride Price on request 70454 Benzo(g,h,i)perylene-d12, 1000µg/ml in Methylen Chloride, 1ml Price on request 70274 1,2,4,5-Tetrachlorobenzene, 1000µg/ml in MeOH, 1ml Price on request