| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 509.29 | USD | 20251211 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 509.29 | USD | 20251211 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 636.62 | USD | 20251211 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 629.54 | USD | 20251211 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 508.81 | USD | 20251210 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 628.95 | USD | 20251210 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 508.67 | USD | 20251209 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 628.77 | USD | 20251209 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 508.73 | USD | 20251208 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 628.85 | USD | 20251208 |