EPA Method 525 Internals & Surrogates

Patent Blue V, Na salt, neat, Solvent-neat, Unit 250mg, # of units-1, Cas.no. 20262-76-4

2,2,4,6-Tetrachlorobiphenyl (BZ-50)

1,3,7,8-Tetrachlorodibenzofuran, 1.2ml x 50ug/ml, nonane