| Vendor | Spec | Unit | Price | Currency | Date |
| chempricehub | National standard | Kg | 2.2 | USD | 20180319 |
| chempricehub | National standard | Kg | 2.01 | USD | 20180318 |
| chempricehub | National standard | Kg | 0.31 | USD | 20180318 |
| chempricehub | National standard | Kg | 0.35 | USD | 20180318 |
| chempricehub | National standard | Kg | 0.39 | USD | 20180318 |
| chempricehub | National standard | Kg | 0.31 | USD | 20180317 |
| chempricehub | National standard | Kg | 0.35 | USD | 20180317 |
| chempricehub | National standard | Kg | 0.33 | USD | 20180317 |
| chempricehub | National standard | Kg | 2.2 | USD | 20180316 |
| chempricehub | National standard | Kg | 0.31 | USD | 20180316 |