| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1298.41 | USD | 20251028 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1333.69 | USD | 20251028 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1333.22 | USD | 20251027 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1332.34 | USD | 20251024 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1297.09 | USD | 20251024 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1297.27 | USD | 20251023 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1332.52 | USD | 20251023 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1297.05 | USD | 20251021 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1332.3 | USD | 20251021 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1296.27 | USD | 20251020 |