| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Qiangsen Chem | China national standards | MT | 819.68 | USD | 20251201 |
| Sinopec | China national standards | MT | 791.42 | USD | 20251201 |
| Sinopec | China national standards | MT | 791.42 | USD | 20251201 |
| Sinopec | China national standards | MT | 791.42 | USD | 20251201 |
| Wanhua Yantai | China national standards | MT | 791.42 | USD | 20251201 |
| Wanhua Yantai | China national standards | MT | 890.35 | USD | 20251201 |
| Shandong Yihe Chem | China national standards | MT | 791.42 | USD | 20251201 |
| Wanhua Yantai | China national standards | MT | 791.08 | USD | 20251130 |
| Jinan Qi Mat | China national standards | MT | 1031.23 | USD | 20251130 |
| Satellite Chem | China national standards | MT | 791.08 | USD | 20251130 |