| Vendor | Spec | Unit | Price | Currency | Date |
| chempricehub | National standard | Kg | 0.1 | USD | 20190523 |
| chempricehub | National standard | Kg | 0.98 | USD | 20190523 |
| chempricehub | National standard | Kg | 0.1 | USD | 20190522 |
| chempricehub | National standard | Kg | 0.6 | USD | 20190522 |
| chempricehub | National standard | Kg | 0.1 | USD | 20190521 |
| chempricehub | National standard | Kg | 0.6 | USD | 20190521 |
| chempricehub | National standard | Kg | 0.71 | USD | 20190521 |
| chempricehub | National standard | Kg | 0.68 | USD | 20190521 |
| chempricehub | National standard | Kg | 0.66 | USD | 20190520 |
| chempricehub | National standard | Kg | 0.66 | USD | 20190520 |