| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Hongyang Chemical Co., Ltd. | China national standards | MT | 190.08 | USD | 20251014 |
| Shandong Hongyang Chemical Co., Ltd. | China national standards | MT | 190.12 | USD | 20251013 |
| Shandong Hongyang Chemical Co., Ltd. | China national standards | MT | 190.01 | USD | 20251011 |
| Shandong Hongyang Chemical Co., Ltd. | China national standards | MT | 190.01 | USD | 20251010 |
| Shandong Hongyang Chemical Co., Ltd. | China national standards | MT | 189.87 | USD | 20251009 |
| Shandong Hongyang Chemical Co., Ltd. | China national standards | MT | 189.99 | USD | 20250930 |
| Shandong Hongyang Chemical Co., Ltd. | China national standards | MT | 189.73 | USD | 20250928 |