| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 452.27 | USD | 20251203 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 402.78 | USD | 20251201 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 452.24 | USD | 20251201 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 407.02 | USD | 20251201 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 406.84 | USD | 20251128 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 452.05 | USD | 20251128 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 402.6 | USD | 20251128 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 406.9 | USD | 20251127 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 402.66 | USD | 20251127 |
| Shandong Langcheng Chemical Co., Ltd. | 90% | MT | 452.11 | USD | 20251127 |