| Vendor | Spec | Unit | Price | Currency | Date |
| Shanxi Hengxin Chem | N220 | MT | 1212.96 | USD | 20251105 |
| Shandong Junfeng | China national standards | MT | 1213.23 | USD | 20251104 |
| Shandong Junfeng | N220 | MT | 987.51 | USD | 20251104 |
| Shandong Junfeng | China national standards | MT | 1213.54 | USD | 20251103 |
| Shanxi Hengxin Chem | N220 | MT | 1213.54 | USD | 20251103 |
| Hebei Shibei Rubber | N220 | MT | 973.65 | USD | 20251103 |
| Shanxi Hengxin Chem | N220 | MT | 931.32 | USD | 20251103 |
| Dongguan Canyu Chem | N220 | MT | 987.77 | USD | 20251103 |
| Shandong Junfeng | N220 | MT | 987.77 | USD | 20251103 |
| Shanxi Hengxin Chem | N220 | MT | 1213.32 | USD | 20251102 |