| Vendor | Spec | Unit | Price | Currency | Date |
| Tianjin Shengtongtai Chemical Co., Ltd. | China national standards | MT | 351.61 | USD | 20251009 |
| Tianjin Shengtongtai Chemical Co., Ltd. | China national standards | MT | 351.67 | USD | 20250929 |
| Tianjin Shengtongtai Chemical Co., Ltd. | China national standards | MT | 351.36 | USD | 20250928 |
| Tianjin Shengtongtai Chemical Co., Ltd. | China national standards | MT | 351.36 | USD | 20250926 |
| Tianjin Shengtongtai Chemical Co., Ltd. | China national standards | MT | 351.83 | USD | 20250925 |
| Tianjin Shengtongtai Chemical Co., Ltd. | China national standards | MT | 351.83 | USD | 20250924 |
| Tianjin Shengtongtai Chemical Co., Ltd. | China national standards | MT | 351.59 | USD | 20250922 |
| Tianjin Shengtongtai Chemical Co., Ltd. | China national standards | MT | 351.48 | USD | 20250920 |