| Vendor | Spec | Unit | Price | Currency | Date |
| chempricehub | National standard | Kg | 0.11 | USD | 20200417 |
| chempricehub | National standard | Kg | 0.11 | USD | 20200417 |
| chempricehub | National standard | Kg | 1.52 | USD | 20200415 |
| chempricehub | National standard | Kg | 0.88 | USD | 20200415 |
| chempricehub | National standard | Kg | 1.52 | USD | 20200414 |
| chempricehub | National standard | Kg | 0.37 | USD | 20200414 |
| chempricehub | National standard | Kg | 2.64 | USD | 20200413 |
| chempricehub | National standard | Kg | 0.78 | USD | 20200412 |
| chempricehub | National standard | Kg | 0.22 | USD | 20200411 |
| chempricehub | National standard | Kg | 0.79 | USD | 20200410 |