| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 820.53 | USD | 20251211 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 819.75 | USD | 20251210 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 819.52 | USD | 20251209 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 819.63 | USD | 20251208 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 819.8 | USD | 20251206 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 819.8 | USD | 20251205 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 819.99 | USD | 20251204 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 819.74 | USD | 20251203 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 819.28 | USD | 20251202 |
| Shandong Qiangsen Chemical Co., Ltd. | China national standards | MT | 819.68 | USD | 20251201 |