pH 12.0 Standard @ 25°C Back Catalog number: 50127 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679877 2-Methyl-5-nitroaniline, 100 µg/ml, Acetonitrile, Price on request 59509 Element Mix #3 Price on request 30063R EPA Method 502/524 High Conc VOC Mix #6 Price on request