EPA Method 8121 Internal Standard Back Catalog number: 81203 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11374.12-K-IO 2-Nitrodibenzothiophene,1000 µg/mL,isooctane,1mL, Price on request BB-77 3,3',4,4'-Tetrabromobiphenyl, 1.2ml x 50ug/ml, nonane Price on request S-4097-100MG Imbentin-N/020 (n = 0-4) 100mg S-4097 Price on request