| Vendor | Spec | Unit | Price | Currency | Date |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 522.36 | USD | 20251112 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 522.11 | USD | 20251111 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 522.19 | USD | 20251110 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 521.85 | USD | 20251105 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 522.1 | USD | 20251103 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 522.01 | USD | 20251101 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 522.19 | USD | 20251028 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 522.0 | USD | 20251027 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 521.66 | USD | 20251024 |
| Baozhen Chemical (Shandong) Co., Ltd. | China national standards | MT | 521.73 | USD | 20251023 |