| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1055.78 | USD | 20250729 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1056.43 | USD | 20250728 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 965.48 | USD | 20250728 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 966.13 | USD | 20250726 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1057.14 | USD | 20250726 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1057.14 | USD | 20250725 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 966.13 | USD | 20250725 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 966.59 | USD | 20250724 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1057.65 | USD | 20250724 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 966.2 | USD | 20250723 |