| Vendor | Spec | Unit | Price | Currency | Date |
| Shanghai Ronghe Chemical Co., Ltd. | China national standards | MT | 720.61 | USD | 20251209 |
| Shanghai Ronghe Chemical Co., Ltd. | China national standards | MT | 720.86 | USD | 20251206 |
| Shanghai Ronghe Chemical Co., Ltd. | China national standards | MT | 719.97 | USD | 20251107 |