| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 249.75 | USD | 20251119 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 249.8 | USD | 20251118 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 249.94 | USD | 20251117 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 249.91 | USD | 20251116 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 249.91 | USD | 20251114 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 256.83 | USD | 20251113 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 256.94 | USD | 20251112 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 256.82 | USD | 20251111 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 254.04 | USD | 20251110 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 254.11 | USD | 20251109 |