| Vendor | Spec | Unit | Price | Currency | Date |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 189.87 | USD | 20251009 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 189.87 | USD | 20251009 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 189.9 | USD | 20250929 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 189.9 | USD | 20250929 |
| Guangzhou Zhan'en Chemical Co., Ltd. | China national standards | MT | 189.86 | USD | 20250922 |