Metals Mix Back Catalog number: 50397 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 93199 EPA Method 526 Standard Price on request MBP-60 2,3,4,4'-Tetrachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane Price on request 59899 Nitrite (NO2-) as N Price on request