| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1108.85 | USD | 20251202 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1101.79 | USD | 20251202 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1116.47 | USD | 20251201 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1109.4 | USD | 20251201 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1102.33 | USD | 20251201 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1116.47 | USD | 20251201 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1130.6 | USD | 20251201 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1115.99 | USD | 20251129 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1115.99 | USD | 20251129 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1130.12 | USD | 20251129 |