| Item | Unit | Test Method | Specification |
|---|---|---|---|
| Appearance | Visual | Clear and Free From Matter in Suspension | |
| Colour | APHA | DIN ISO 6271 | 40 Maximum |
| Density @ 20°C | g/cm3 | DIN 51 757 | 0.993 - 0.995 |
| Water | wt% | ASTM E 203 | 0.05 Maximum |
| Acidity | mg/KOH/gm | DIN 53 402 | 0.05 Maximum |
| Refractive Index @ 20ºC | DIN 51 423/2 | 1.445 - 1.446 | |
| Ester Content | wt% | GC | 98.5 Minimum |
| Dibutyl Maleate Content | wt% | GC | 96.5 Minimum |
| Dibutyl Fumarate Content | wt% | GC | 2.0 Minimum |