| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1068.8 | USD | 20250903 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1069.08 | USD | 20250902 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1069.08 | USD | 20250902 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1069.34 | USD | 20250901 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1112.21 | USD | 20250831 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1112.21 | USD | 20250830 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1112.21 | USD | 20250829 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1111.69 | USD | 20250828 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1110.99 | USD | 20250827 |
| Qingdao Shengze Chemical Co., Ltd. | China national standards | MT | 1109.74 | USD | 20250826 |