PCB No. 21, 100µg/ml in Isooctane, 1ml Back Catalog number: 66021 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended S-4368-200-5DC EPA 528 rev. 1.0 Internal Standard Solution 2 200µg/mL in dichloromethane; unit: 1x5mL 2081.6 2,3,4,5-Tetrachlorophenol [4901-51-3] Price on request 680575 Thiometon-sulfone, 100 µg/ml, Cyclohexane, 1ml Price on request 3M118 2,3',4,4',5-Pentachloro-3-methoxybiphenyl, 1.2ml x 50ug/ml, nonane Price on request