| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 452.15 | USD | 20251209 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 402.7 | USD | 20251209 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 452.21 | USD | 20251208 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 406.99 | USD | 20251208 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 402.75 | USD | 20251208 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 452.41 | USD | 20251204 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 407.16 | USD | 20251204 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 402.92 | USD | 20251204 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 402.8 | USD | 20251203 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 452.27 | USD | 20251203 |