Method 1640 Tuning Standard Back Catalog number: 53147 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2509.6-K-IP 2,3,4,6-Tetrabromophenol, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 14400-94-3 Price on request 3968.6-25MG 1,1,1-Trimethylolpropanephosphate, neat, Solvent-neat, Unit 25mg, # of units-1, Cas.no. 1005-93-2 Price on request 54558 Potassium (K) Price on request