Quinoxaline-2-carboxylic acid Back Catalog number: 71493 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 92800 EPA Method 8141A/1657 - Analytes Price on request 59535 CRL I Price on request M1408 Sodium 2-Methyl-2-propene-1-sulfonate, 25g Price on request