| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 956.9 | USD | 20250828 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 956.29 | USD | 20250827 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 955.22 | USD | 20250826 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 955.58 | USD | 20250825 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 946.43 | USD | 20250823 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 946.43 | USD | 20250822 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 946.88 | USD | 20250821 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 945.59 | USD | 20250820 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 945.92 | USD | 20250819 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 911.36 | USD | 20250818 |