| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 689.44 | USD | 20250901 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 689.85 | USD | 20250831 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 689.85 | USD | 20250830 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 689.85 | USD | 20250829 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 689.85 | USD | 20250829 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 689.53 | USD | 20250828 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 689.09 | USD | 20250827 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 688.32 | USD | 20250826 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 688.58 | USD | 20250825 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 688.58 | USD | 20250825 |