| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 979.47 | USD | 20250728 |
| Shandong Yeyang Chemical Co., Ltd. | China national standards | MT | 979.47 | USD | 20250728 |
| Aite (Zhejiang) Supply Chain Management Co., Ltd. | China national standards | MT | 1189.36 | USD | 20250728 |
| Shandong Huize Chemical Technology Co., Ltd. | China national standards | MT | 979.47 | USD | 20250728 |
| China national standards | MT | 220.0 | USD | 20210323 | |
| China national standards | MT | 1140.0 | USD | 20210320 | |
| China national standards | MT | 190.0 | USD | 20210320 | |
| China national standards | MT | 170.0 | USD | 20210319 | |
| China national standards | MT | 180.0 | USD | 20210319 | |
| China national standards | MT | 140.0 | USD | 20210319 |