| Vendor | Spec | Unit | Price | Currency | Date |
| Qingdao Chengxin Chem | Food Grade | MT | 253.95 | USD | 20251031 |
| Qingdao Chengxin Chem | Food Grade | MT | 254.01 | USD | 20251030 |
| Qingdao Chengxin Chem | Food Grade | MT | 253.64 | USD | 20251016 |
| Qingdao Chengxin Chem | Food Grade | MT | 253.54 | USD | 20251015 |
| Qingdao Chengxin Chem | Food Grade | MT | 253.32 | USD | 20250930 |
| Qingdao Chengxin Chem | Food Grade | MT | 253.2 | USD | 20250929 |
| Qingdao Chengxin Chem | Food Grade | MT | 252.98 | USD | 20250926 |
| Qingdao Chengxin Chem | Food Grade | MT | 253.32 | USD | 20250925 |
| Qingdao Chengxin Chem | Food Grade | MT | 253.32 | USD | 20250924 |
| Qingdao Chengxin Chem | China national standards | MT | 253.14 | USD | 20250922 |