Generalized Risk Evaluation Matrixa
| Risk Variable | Risk Level | Risk Value | Product Risk Index |
|---|---|---|---|
| Material Type | Reactive | 10 | 1 |
| Interactive | 5 | ||
| Inert | 1 | ||
| Extraction Strength of Solution | Organic | 10 | 1 |
| Water/organic | 5 | ||
| Water | 1 | ||
| Contact Duration | >30 days | 10 | 5 |
| 24 h to 30 days | 5 | ||
| <24 h | 1 | ||
| Contact Surface Area | >5000 cm2 | 10 | 5 |
| 2000–5000 cm2 | 5 | ||
| <2000 cm2 | 1 | ||
| Contact Temperature | >70 °C | 10 | 5 |
| 25–70 °C | 5 | ||
| <25 °C | 1 | ||
| Proximity to Finished Product | Final product | 10 | 10 |
| Purified to final product | 5 | ||
| Remote from final product | 1 | ||
| Total Risk Index (<20 = low, 20–50 = moderate, 50–60 = high, >60 = reject) | 27 | ||
↵Note: a Obtained from reference 12.