| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Ruishuang Chemical Co., Ltd. | China national standards | MT | 424.01 | USD | 20251210 |
| Qingdao Ruishuang Chemical Co., Ltd. | China national standards | MT | 423.89 | USD | 20251209 |
| Qingdao Ruishuang Chemical Co., Ltd. | China national standards | MT | 424.03 | USD | 20251205 |
| Qingdao Ruishuang Chemical Co., Ltd. | China national standards | MT | 424.13 | USD | 20251204 |
| Qingdao Ruishuang Chemical Co., Ltd. | China national standards | MT | 423.76 | USD | 20251202 |
| Qingdao Ruishuang Chemical Co., Ltd. | China national standards | MT | 423.79 | USD | 20251129 |
| Qingdao Ruishuang Chemical Co., Ltd. | China national standards | MT | 423.79 | USD | 20251128 |
| Qingdao Ruishuang Chemical Co., Ltd. | China national standards | MT | 423.75 | USD | 20251126 |
| Qingdao Ruishuang Chemical Co., Ltd. | China national standards | MT | 423.45 | USD | 20251124 |
| Qingdao Ruishuang Chemical Co., Ltd. | China national standards | MT | 423.1 | USD | 20251120 |