| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Tongzhou Chemical Co., Ltd. | China national standards | MT | 1410.08 | USD | 20251023 |
| Shandong Tongzhou Chemical Co., Ltd. | China national standards | MT | 1409.36 | USD | 20251022 |
| Shandong Tongzhou Chemical Co., Ltd. | China national standards | MT | 1408.99 | USD | 20251020 |
| Shandong Tongzhou Chemical Co., Ltd. | China national standards | MT | 1409.46 | USD | 20251017 |
| Shandong Tongzhou Chemical Co., Ltd. | China national standards | MT | 1408.55 | USD | 20251015 |
| Shandong Tongzhou Chemical Co., Ltd. | China national standards | MT | 1478.44 | USD | 20251014 |
| Shandong Tongzhou Chemical Co., Ltd. | China national standards | MT | 1407.5 | USD | 20251011 |
| Shandong Tongzhou Chemical Co., Ltd. | China national standards | MT | 1407.36 | USD | 20250930 |
| Shandong Tongzhou Chemical Co., Ltd. | China national standards | MT | 1405.44 | USD | 20250928 |
| Shandong Tongzhou Chemical Co., Ltd. | China national standards | MT | 1405.44 | USD | 20250927 |