| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 541.86 | USD | 20250904 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 541.86 | USD | 20250904 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 541.57 | USD | 20250902 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 541.57 | USD | 20250902 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 541.7 | USD | 20250901 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 541.7 | USD | 20250901 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 542.02 | USD | 20250831 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 542.02 | USD | 20250831 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 542.02 | USD | 20250830 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 542.02 | USD | 20250830 |