| Vendor | Spec | Unit | Price | Currency | Date |
| Dongying Hebang Chemical Co., Ltd. | China national standards | MT | 1350.42 | USD | 20250929 |
| Dongying Hebang Chemical Co., Ltd. | China national standards | MT | 1349.22 | USD | 20250928 |
| Dongying Hebang Chemical Co., Ltd. | China national standards | MT | 1349.22 | USD | 20250926 |
| Dongying Hebang Chemical Co., Ltd. | China national standards | MT | 1351.03 | USD | 20250925 |
| Dongying Hebang Chemical Co., Ltd. | China national standards | MT | 1351.03 | USD | 20250924 |
| Dongying Hebang Chemical Co., Ltd. | China national standards | MT | 1351.03 | USD | 20250923 |
| Dongying Hebang Chemical Co., Ltd. | China national standards | MT | 1350.1 | USD | 20250922 |
| Dongying Hebang Chemical Co., Ltd. | China national standards | MT | 1349.68 | USD | 20250919 |