| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1174.03 | USD | 20251103 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1173.81 | USD | 20251101 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1250.0 | USD | 20251101 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1250.0 | USD | 20251031 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1173.81 | USD | 20251031 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1173.81 | USD | 20251031 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1174.08 | USD | 20251030 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1250.28 | USD | 20251030 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1174.43 | USD | 20251029 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1250.65 | USD | 20251029 |