| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 255.96 | USD | 20250922 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 255.88 | USD | 20250920 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 255.88 | USD | 20250919 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 256.03 | USD | 20250918 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 260.46 | USD | 20250916 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 260.36 | USD | 20250915 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 264.76 | USD | 20250909 |
| 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 | 274.3 | USD | 20250902 |