| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 387.77 | USD | 20251023 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 394.82 | USD | 20251023 |
| Shandong Zhenkun New Materials Co., Ltd. | China national standards | MT | 423.02 | USD | 20251023 |
| China national standards | MT | 423.02 | USD | 20251023 | |
| Shandong Zhenkun New Materials Co., Ltd. | China national standards | MT | 394.82 | USD | 20251023 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 369.44 | USD | 20251023 |
| China national standards | MT | 369.44 | USD | 20251023 | |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 373.67 | USD | 20251023 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 369.25 | USD | 20251022 |
| Yankuang Guotai Chemical Co., Ltd. | China national standards | MT | 373.48 | USD | 20251022 |