| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 256.02 | USD | 20250929 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 255.79 | USD | 20250927 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 255.79 | USD | 20250926 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 256.13 | USD | 20250925 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 256.13 | USD | 20250924 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 256.13 | USD | 20250923 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 255.96 | USD | 20250922 |
| 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 | 20250920 |