| Product Name | Tetrabutylurea (TBU) |
| CAS No. | 4559-86-8 |
| Molecular Formula | C17H36N2O |
| Structural Formula |  |
| Appearance (25°C) | Clear, colorless oily liquid |
| Assay, % | ≥ 99.5 |
| Di-n-butylamine, % | ≤ 0.10 |
| Color (APHA, Hazen) | ≤ 30 |
| Total Sulfur, ppm | ≤ 5 |
| Total Halogens (as Cl), ppm | ≤ 10.0 |
| Water, % (m/m) | ≤ 0.10 |
| Acid Value, mgKOH/g | ≤ 0.15 |
| Boiling Range, °C | 310–315 |
| Density (20°C), g/mL | 0.874–0.880 |
| Packing | 175 kg drums; 900 kg IBC; bulk tank; or per request |
| Applications | Use 1: Polar solvent in the anthraquinone H₂O₂ process, mixed with heavy aromatics; often used as a TOP replacement. Typical ratio TBU:heavy aromatics = 1:1–1:5 (optimize by plant trials). Benefits: higher AQ/HAQ solubility and good phase behavior (subject to site validation). Use 2: High-boiling polar aprotic solvent / processing aid in organic synthesis (e.g., some coupling/catalysis); adoption depends on reaction and EHS assessment. |
