Specifications
| Appearance | White, free flowing crystalline powder, free from visible contamination |
| Acid Number(mg KOH/g) | 675 + 2 |
| 4-Carboxybenzaldehyde (ppm w/w) | Max 25 |
| Combined p-toluic acid & 4-Carboxybenzaldehyde (ppm w/w) | Max 190 |
| Benzoic acid (ppm w/w) | Max 30 |
| Al,Ca,Co,Cr,Fe,K,Mg,Mn,Na,Ni,Ti,(ppm w/w) | None greater than 1 and in total max 4 |
| Water (% pct w/w) | Max 0.15 |
| Ash (ppm w/w) | Max 6 |
| Millipore | Min 0.90 |
| Appearance compared with standard | Acceptable |
| b* colour | 0.4 – 1.2 |
| Typical Physical Properties | |
| Molecular weight | 166.30 |
| Melting Point in sealed tube (°C) | 425 (sublimation occurs above 300°C at atmospheric pressure). |
| Solubility | 1 part in 67,000 parts water at 10 °C. Partially soluble in dimethyl formamide and pyridine. |
| Typical median particle size range (micron) | 130 ± 25 |
| Typical bulk density g/ml (DIN 53194) | 1.12 |
| Typical angle of repose (degrees) (poured) | Poured 40 |
Last Updated on September 5, 2024