Sodium tetraphenylborate Cas no.:143-66-8 Chemical formula:C24h20bna Molecular weight:342.2 AppearanceWhite crystal. Assay99.0% min Loss on drying-_0.5·± Clarity of solutionConformed. Colorless and clear. UsesAnalytical reagent for ammonium, potassium, rubidium, and cesium ions. Package25kg/ fiber drum StorageKeep away from light.