| Vendor | Spec | Unit | Price | Currency | Date |
| Henan Lanen Chemical Co., Ltd. | China national standards | MT | 177.98 | USD | 20251202 |
| Henan Lanen Chemical Co., Ltd. | China national standards | MT | 177.85 | USD | 20251124 |
| Henan Lanen Chemical Co., Ltd. | China national standards | MT | 177.7 | USD | 20251120 |
| Henan Lanen Chemical Co., Ltd. | China national standards | MT | 169.36 | USD | 20251110 |
| Henan Lanen Chemical Co., Ltd. | China national standards | MT | 169.41 | USD | 20251107 |
| Henan Lanen Chemical Co., Ltd. | China national standards | MT | 177.8 | USD | 20251106 |
| Henan Lanen Chemical Co., Ltd. | China national standards | MT | 177.71 | USD | 20251105 |
| Henan Lanen Chemical Co., Ltd. | China national standards | MT | 177.75 | USD | 20251104 |
| Henan Lanen Chemical Co., Ltd. | China national standards | MT | 177.8 | USD | 20251103 |
| Henan Lanen Chemical Co., Ltd. | China national standards | MT | 177.77 | USD | 20251101 |