| Vendor | Spec | Unit | Price | Currency | Date |
| chempricehub | National standard | Kg | 0.1 | USD | 20190901 |
| chempricehub | National standard | Kg | 0.7 | USD | 20190901 |
| chempricehub | National standard | Kg | 29.76 | USD | 20190823 |
| chempricehub | National standard | Kg | 20.96 | USD | 20190821 |
| chempricehub | National standard | Kg | 0.13 | USD | 20190820 |
| chempricehub | National standard | Kg | 0.92 | USD | 20190820 |
| chempricehub | National standard | Kg | 298.33 | USD | 20190819 |
| chempricehub | National standard | Kg | 0.71 | USD | 20190819 |
| chempricehub | National standard | Kg | 0.92 | USD | 20190818 |
| chempricehub | National standard | Kg | 115.66 | USD | 20190816 |