pH 9.0 Standard @ 25°C Back Catalog number: 59628 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 50678 Propionic Acid (C3H6O2) Price on request 680175 3-Chloro-2-methylaniline, 250mg Price on request 71552 2,3,5-Trimethylnaphthalene Price on request