| Vendor | Spec | Unit | Price | Currency | Date |
| Hunan Jinyu Fine Chemical Co., Ltd. | China national standards | MT | 818.28 | USD | 20251031 |
| Hunan Jinyu Fine Chemical Co., Ltd. | China national standards | MT | 817.49 | USD | 20251017 |
| Hunan Jinyu Fine Chemical Co., Ltd. | China national standards | MT | 815.43 | USD | 20250919 |