| Vendor | Spec | Unit | Price | Currency | Date |
| chempricehub | National standard | Kg | 69.67 | USD | 20180819 |
| chempricehub | National standard | Kg | 172.15 | USD | 20180818 |
| chempricehub | National standard | Kg | 25.91 | USD | 20180817 |
| chempricehub | National standard | Kg | 47.2 | USD | 20180817 |
| chempricehub | National standard | Kg | 2.88 | USD | 20180817 |
| chempricehub | National standard | Kg | 0.15 | USD | 20180816 |
| chempricehub | National standard | Kg | 1.48 | USD | 20180816 |
| chempricehub | National standard | Kg | 0.7 | USD | 20180815 |
| chempricehub | National standard | Kg | 1.42 | USD | 20180814 |
| chempricehub | National standard | Kg | 9.91 | USD | 20180814 |