Massachusetts APH Standard Back Catalog number: 94496 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended DF-123478-S 1,2,3,4,7,8-Hexachlorodibenzofuran , 1.2ml x 50ug/ml, nonane Price on request 32891 1,2,4,5-Tetramethylbenzene Price on request DF-1349-S 1,3,4,9-Tetrachlorodibenzofuran, 1.2ml x 50ug/ml, nonane Price on request