| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 720.76 | USD | 20251201 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 720.45 | USD | 20251130 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 720.45 | USD | 20251129 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 720.45 | USD | 20251128 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 720.55 | USD | 20251127 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 720.38 | USD | 20251126 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 720.07 | USD | 20251125 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 719.86 | USD | 20251124 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 719.58 | USD | 20251123 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 719.58 | USD | 20251122 |