| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 451.33 | USD | 20251105 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 402.06 | USD | 20251104 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 451.44 | USD | 20251104 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 406.29 | USD | 20251104 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 402.16 | USD | 20251103 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 406.4 | USD | 20251103 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 451.55 | USD | 20251103 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 402.09 | USD | 20251101 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 451.47 | USD | 20251101 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 406.32 | USD | 20251101 |