| Vendor | Spec | Unit | Price | Currency | Date |
| chempricehub | National standard | Kg | 98.95 | USD | 20180701 |
| chempricehub | National standard | Kg | 97.52 | USD | 20180701 |
| chempricehub | National standard | Kg | 15.38 | USD | 20180701 |
| chempricehub | National standard | Kg | 97.52 | USD | 20180701 |
| chempricehub | National standard | Kg | 21.6 | USD | 20180623 |
| chempricehub | National standard | Kg | 99.66 | USD | 20180622 |
| chempricehub | National standard | Kg | 15.53 | USD | 20180621 |
| chempricehub | National standard | Kg | 15.67 | USD | 20180621 |
| chempricehub | National standard | Kg | 122.99 | USD | 20180620 |
| chempricehub | National standard | Kg | 100.0 | USD | 20180620 |