| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 271.72 | USD | 20250908 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 271.72 | USD | 20250908 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 271.59 | USD | 20250906 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 271.59 | USD | 20250906 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 274.3 | USD | 20250902 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 274.3 | USD | 20250902 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 274.37 | USD | 20250901 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 274.37 | USD | 20250901 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 284.39 | USD | 20250831 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 284.39 | USD | 20250831 |