Parameter | Requirement |
Volatile matter at 105°C (%) | ≤0.5 |
Water soluble matter (%) | ≤0.3 |
Residue on sieve (45μm) (%) | ≤0.05 |
Color L* | ≥96.0 |
pH value of water suspension | 6.5-8.0 |
Oil absorption (g/100g) | ≤19 |
Electrical resistivity of water extract (Ω·m) | ≥50 |
Rutile crystal phase content (%) | ≥98 |
Oil dispersibility (Hegman number) | ≥6.0 |