| Vendor | Spec | Unit | Price | Currency | Date |
| Shanxi Hengxin Chemical Co., Ltd. | N220 | MT | 1214.24 | USD | 20251125 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1214.24 | USD | 20251125 |
| Shandong Junfeng New Materials Co., Ltd. | N220 | MT | 988.04 | USD | 20251124 |
| Shanxi Hengxin Chemical Co., Ltd. | N220 | MT | 1213.88 | USD | 20251124 |
| Shandong Junfeng New Materials Co., Ltd. | China national standards | MT | 1213.88 | USD | 20251124 |
| Shanxi Hengxin Chemical Co., Ltd. | N220 | MT | 1213.4 | USD | 20251122 |
| Shandong Junfeng New Materials Co., Ltd. | N220 | MT | 987.65 | USD | 20251121 |
| Hebei Shibei Rubber Technology Development Co., Ltd. | N220 | MT | 959.44 | USD | 20251121 |
| Shanxi Hengxin Chemical Co., Ltd. | N220 | MT | 945.33 | USD | 20251121 |
| Dongguan Canyu Chemical Co., Ltd. | N220 | MT | 973.54 | USD | 20251121 |