| Vendor | Spec | Unit | Price | Currency | Date |
| Jia'en Chemical (Shandong) Co., Ltd. | China national standards | MT | 274.24 | USD | 20250922 |
| Jia'en Chemical (Shandong) Co., Ltd. | China national standards | MT | 267.21 | USD | 20250922 |
| Jia'en Chemical (Shandong) Co., Ltd. | China national standards | MT | 267.12 | USD | 20250919 |
| Jia'en Chemical (Shandong) Co., Ltd. | China national standards | MT | 267.29 | USD | 20250918 |