Product Name: Piperonyl Butoxide (Butóxido de Piperonilo). CAS No.: 51-03-6. Purity: 95% Min. Appearance: Slightly yellowish oily liquid. Relative Density (20/20C): 1.0400-1.0700. Refractive Index (20/20C): 1.4850-1.5100. Acidity (as H2SO4): 0.15% Max. Moisture: 0.20% Max. Package: Net 200kgs/iron drums with PVF inside.