| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 233.19 | USD | 20251201 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 233.09 | USD | 20251130 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 233.09 | USD | 20251128 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 240.18 | USD | 20251127 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 240.13 | USD | 20251126 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 240.02 | USD | 20251125 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 239.95 | USD | 20251124 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 239.86 | USD | 20251123 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 239.86 | USD | 20251122 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 239.86 | USD | 20251121 |