Terephthalic acid, 250mg Back Catalog number: 676591 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 83509 EPA Method 8315 Calibration Mix #1 Price on request 98557 Formaldehyde (5 ppm) Price on request 680135 2,4-Dimethylaniline, 100 µg/ml, Acetonitrile, 5m Price on request