| Vendor | Spec | Unit | Price | Currency | Date | 
| Shandong LuoHeng Chemical Products Co., Ltd. | China national standards | MT | 336.2 | USD | 20250929 | 
| Shandong LuoHeng Chemical Products Co., Ltd. | China national standards | MT | 336.35 | USD | 20250925 | 
| Shandong LuoHeng Chemical Products Co., Ltd. | China national standards | MT | 336.35 | USD | 20250924 | 
| Shandong LuoHeng Chemical Products Co., Ltd. | China national standards | MT | 336.35 | USD | 20250923 | 
| Shandong LuoHeng Chemical Products Co., Ltd. | China national standards | MT | 336.12 | USD | 20250922 |