| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 627.64 | USD | 20251105 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 627.78 | USD | 20251104 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 507.86 | USD | 20251104 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 507.99 | USD | 20251103 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 627.94 | USD | 20251103 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 627.82 | USD | 20251101 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 507.9 | USD | 20251101 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 507.9 | USD | 20251031 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 627.82 | USD | 20251031 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 507.9 | USD | 20251031 |